> No kidding. There was a reason apple started doing their genuine battery warnings
Maybe, but that's still a problem they created for themselves. Knockoff sellers would never have marketshare (and thus less economies of scale, reducing their cost advantage) if you can buy the genuine thing for a reasonable price as conveniently as you can buy the knockoff.
A lot of third-party/aftermarket parts are used not even because of cost but availability. Amazon offers same or next-day shipping for a lot of these knockoff batteries.
This reminds me of an incident when I needed to replace a lost AirPod - I was ready to pay and yet couldn't just walk into an Apple Store and buy the part. I had to instead set up a "repair" and wait for shipping and then UPS screwed it up twice. It took weeks and hours of annoyance over email/phone for something that should've taken 15 minutes to buy at the Apple Store on my way to the office.
This was a bad scam too because a lot of pretty naive folks got suckered in (battery says 100% but phone is dying, must be something wrong with phone)