I'm surprised and confused somebody would use a public-facing website like Instagram to do something so illegal and taboo. Wouldn't they use Tor or at least a p

I'm surprised and confused somebody would use a public-facing website like Instagram to do something so illegal and taboo. Wouldn't they use Tor or at least a private Telegram chat? What, do they just paypal the money? Seems like a recipe for getting arrested. EDIT: The article says a lot of the accounts are supposed to be run by kids themselves so maybe that has something to do with it?