Spam and other malicious behaviour. It's time consuming for mods to block spammers.
Instagram also don't charge users and yet they verify identity.
Re:Stripe Identity
by arcturus17 on Monday June 14, 2021 @01:09PM
(#27505163)
Instagram may be verifying identity now (I didn't know... letting FB scan my id would be one of the last things I would want), but I'm pretty sure they reached a massive scale without such a measure.
What is the usecase?
This strikes me as classic HN bikeshedding.