So after reading everyone's posts on this thread so far no one understands how these apps and sites work.

It's simple cash back, there are tons of sites and apps that do this. And if you notice almost all the stores you earn from are the same and have similar returns. Most of the cash back sites pay out in gift cards or paypal, a few do crypto which I think is great. As for "a few sats" between the my personal uses of cashback sites I've earned about 2.5k in the past 3 years not doing anything out of the normal.

Locations if any of them are local/instore offers they need to know that you are at the store or at the very least to give you a notification to tell you hey go into bestbuy and you get 5% back on your purchase.

Also for KYC and these sites a lot of them are based in the US, after you earn $600 in a year they are required to send you tax forms for your earnings.