I've done something similar in a form of an script that I have to run in a batch (so not real-time). Here is an example: https://www.reddit.com/r/Frugal/comments/7utksx/sortable_list_of_current_amazon_coupons_google/. Is this what you are thinking about?
I think that would work great too. The file/link has been removed, is there somewhere I can follow to know if you've updated it? I don't want to bother you with sporadic requests if it's possible to just follow/wait until you post something new.