> You could also pay randos a $30 gift card to sign up for a developer account and share access. Enough people will do it.

This could work, but the issue here is that a lot of these scams rely on the "zero cost"-ness of turnup and use that as a asymmetry. If it costs you nothing to turn up new scam-accounts, and it costs me something to investigate and remove them, you win. If it costs you $10 to create new scam accounts then as long as I can get the EV of a scam account below $10, the scam isn't worthwhile.