Phone number is the only way to reliably stop MOST abuse on a freemium product that doesn't require payment/identity verification upfront. You can easily block VOIP numbers and ensure the person connected to this number is paying for an actual phone plan, which cuts down dramatically on bogus accounts.
Hence why even Facebook requires a unique, non-VOIP phone number to create an account these days.
I'm sure this comment will get downvoted in favor of some other conspiratorial "because they're going to secretly sell my data!" tinfoil post (this is HN of course). But my explanation is the actual reason.
I would love if I could just use email to signup for free accounts everywhere still, but it's just too easily gamed at scale.
Phone number is the only way to reliably stop MOST abuse on a freemium product that doesn't require payment/identity verification upfront. You can easily block VOIP numbers and ensure the person connected to this number is paying for an actual phone plan, which cuts down dramatically on bogus accounts.
Hence why even Facebook requires a unique, non-VOIP phone number to create an account these days.
I'm sure this comment will get downvoted in favor of some other conspiratorial "because they're going to secretly sell my data!" tinfoil post (this is HN of course). But my explanation is the actual reason.
I would love if I could just use email to signup for free accounts everywhere still, but it's just too easily gamed at scale.