It requires phone number for registration.
Site explain this as it is unique and hard to obtain en masse.
But it is not so. Phone numbers are controlled effectively by governments if needed, they are re-used, and they cheap-dirt in some countries (like, I could get SIM card in Serbia or Laos for about 1 Euro on the street).
About re-use: When I get new number in Serbia Is tarted to get a lot of SMSes and later WhatsApp messages about my debts, from very aggressive people. It was not scam, but this number only 3 months before that was used by some local guy who got into big troubles with loan sharks. They were Ok when I explained that I'm expat with SIM card bought in the newspaper stand, but I needed to explain it something like 50 times!
Sorry, but phone number is BAD ID and SMS is TERRIBLE 2FA / confirmation media.
But it is not so. Phone numbers are controlled effectively by governments if needed, they are re-used, and they cheap-dirt in some countries (like, I could get SIM card in Serbia or Laos for about 1 Euro on the street).
About re-use: When I get new number in Serbia Is tarted to get a lot of SMSes and later WhatsApp messages about my debts, from very aggressive people. It was not scam, but this number only 3 months before that was used by some local guy who got into big troubles with loan sharks. They were Ok when I explained that I'm expat with SIM card bought in the newspaper stand, but I needed to explain it something like 50 times!
Sorry, but phone number is BAD ID and SMS is TERRIBLE 2FA / confirmation media.