i'm not sure if i'm being redundant with this, but this method only recently occurred to me, so i figured maybe others would find this useful! i specifically have colors in mind for this, but it can work for any other dw based tcg if you use etcg :)
first and foremost, you'd going to need a text editor with the replace function! i use windows notepad. if you have an understanding of basic html, that would be helpful to you, but not necessary!
for an example, i'm going to be using this pot of gold round, since i used a double coupon and it exemplifies how much easier this method made updating my tradepost for me; tbh it would have been a nightmare otherwise :,)
log in to your inbox, and for each reward you'll be adding to your tradepost, access the "link" for it. in your text editor, you're going to type (or copy/paste from the header) the game name and round, with a : after.
on each page with your rewards, right click, and select "view page source." its going to bring up a huge page of coding, but don't fret. hit ctrl + f, that will bring up a handy search box. type in the name of the first card, and it should bring you down to an area with a lot of image codes.
copy of the code starting with "< img" to the very last card on the list, ending with ">" and paste them into the text editor after the relevant game round. (there will NOT be a space between the < and the img, but dw won't let me post it otherwise. if there are things labeled as "crayon," those aren't necessary to copy for this method.) if you're not familiar with html and that is a confusing instruction, you can visually see what i'm talking about here. (it's too large of a cap for me to post it since i have a sorta wide screen)
in the text editor, select the first "< img src="http://colors-tcg.eu/cards/" segment, and copy it. (if you're doing this with a tcg other than colors, the url will be different. just copy up to right before the actual card name.)
access the option to "replace." in notepad, it's under edit. it will pull up a box asking what you'd like to replace, and what you'd like to replace it with. paste the "< img src="http://colors-tcg.eu/cards/" into the replace field, and leave the "with" field blank.

hit "replace all," and it should do just that. all the "< img src="http://colors-tcg.eu/cards/" should be gone. the next step is to select the second half of the code, the ".gif" />" part. it's the same process as last time, except this time instead of leaving it blank you're going to put ", " (with the space) in the replace field.

VOILA! a straight list of card names that you didn't have to manually type out! just copy/paste all the game rounds and the cards into your etcg easy updater, and you're good to go, hopefully in a lot less time!
note about currency:
the reason i didn't include crayons/currency is because typically the filename (which etcg relies on) isn't how we log things. for example, the filename for a red crayon is "crayon1" but in our logs we typically just put "red crayon," so it would be more work to copy all the file names and replace them rather than just manually typing them out. the exception to this would be if you note the currency filename in your logs, then you can just copy/paste for log purposes and remove them for uploading; the exception to that would if you keep your currency under your collection tab, in which case just follow through with the entire method and copy/paste the currency names into an update tab for your currency category.
note about rounds:
i mentioned doing a few game rounds each time, that way the replace function just gets all of them at once so you won't have to repeat this too often, but! that's not necessary either. if you're only updating one or two rounds with one or two cards each it may still be quicker to just manually type the cardnames
first and foremost, you'd going to need a text editor with the replace function! i use windows notepad. if you have an understanding of basic html, that would be helpful to you, but not necessary!
for an example, i'm going to be using this pot of gold round, since i used a double coupon and it exemplifies how much easier this method made updating my tradepost for me; tbh it would have been a nightmare otherwise :,)
log in to your inbox, and for each reward you'll be adding to your tradepost, access the "link" for it. in your text editor, you're going to type (or copy/paste from the header) the game name and round, with a : after.
on each page with your rewards, right click, and select "view page source." its going to bring up a huge page of coding, but don't fret. hit ctrl + f, that will bring up a handy search box. type in the name of the first card, and it should bring you down to an area with a lot of image codes.
copy of the code starting with "< img" to the very last card on the list, ending with ">" and paste them into the text editor after the relevant game round. (there will NOT be a space between the < and the img, but dw won't let me post it otherwise. if there are things labeled as "crayon," those aren't necessary to copy for this method.) if you're not familiar with html and that is a confusing instruction, you can visually see what i'm talking about here. (it's too large of a cap for me to post it since i have a sorta wide screen)
in the text editor, select the first "< img src="http://colors-tcg.eu/cards/" segment, and copy it. (if you're doing this with a tcg other than colors, the url will be different. just copy up to right before the actual card name.)
access the option to "replace." in notepad, it's under edit. it will pull up a box asking what you'd like to replace, and what you'd like to replace it with. paste the "< img src="http://colors-tcg.eu/cards/" into the replace field, and leave the "with" field blank.

hit "replace all," and it should do just that. all the "< img src="http://colors-tcg.eu/cards/" should be gone. the next step is to select the second half of the code, the ".gif" />" part. it's the same process as last time, except this time instead of leaving it blank you're going to put ", " (with the space) in the replace field.

VOILA! a straight list of card names that you didn't have to manually type out! just copy/paste all the game rounds and the cards into your etcg easy updater, and you're good to go, hopefully in a lot less time!
note about currency:
the reason i didn't include crayons/currency is because typically the filename (which etcg relies on) isn't how we log things. for example, the filename for a red crayon is "crayon1" but in our logs we typically just put "red crayon," so it would be more work to copy all the file names and replace them rather than just manually typing them out. the exception to this would be if you note the currency filename in your logs, then you can just copy/paste for log purposes and remove them for uploading; the exception to that would if you keep your currency under your collection tab, in which case just follow through with the entire method and copy/paste the currency names into an update tab for your currency category.
note about rounds:
i mentioned doing a few game rounds each time, that way the replace function just gets all of them at once so you won't have to repeat this too often, but! that's not necessary either. if you're only updating one or two rounds with one or two cards each it may still be quicker to just manually type the cardnames