Been using Drop since the beginning and I love it! I shop pretty frequently at Whole Foods and enjoy getting those points back. There's also a good set of ACHIEVABLE offers and I ended up discovering some good products I liked (like WealthSimple). The only con is that redeeming a big amount of gift cards is a pain because each gift card is sent to you individually.
My credit card has stopped linking, it works on other third party apps like Mint but not Drop, and Drop seems to have no support. Their documentation just tells me to talk to my Bank, but this is nothing my Bank can fix for me - I know my card number and password is correct.
Fantastic little app that sits on your phone and allows you to generate free money while doing what I do best ... shop! Love it!