Sounds pretty interesting. Is there some master list of vendors that gives the best rewards for each bank's card you're using to assess which card the extension recommends?
Not that I am currently aware of haha! This is all based on an estimation of merchant categories from domains trained on statement info. And categories are built differently for each card, so trying to build around that. No master list that I scraped.
Sounds good, thanks for checking it out, really appreciate it! I use just the credit cards reward program so I never collect any personal info! Working on adding more cards soon