That's why I don't have apps with online stores even if I am not eligible to receive as many purchase points without them. Also, some outfits share their customer info to their business partners exposing us to possibility of scams and phishing. By using an ad blocker, I avoid a lot of problems.
I used to post reviews on Amazon purchases. But after awhile, Amazon started to send me customers' questions about items I had purchased, where such questions should have been sent to the manufacturer or distributor. I stopped replying to their inquiries. I figured that if they wanted me to give answers, they should pay me.