The issue is that there is no offline play until you purchase - furthermore SEGA still advertises their own games if you're connected to the internet.

Any app, IMHO, that requires to be connected to the internet to play so it can deliver you ads doesn't belong on this list.

Sonic 1, 2 and CD at least behave like this atm.

Does it require you to be connected to the internet? Or does it show you an ad if you are? Also, it shows an ad even if you pay? That doesn't sound great...

I really respect your effort, but something tells me that the list is going to be very short indeed if you don't allow any toxicity at all

It looks like you have a "DLC" flag, maybe add "Online Only" to the list as well..