@kkarhan
Email is, in practice, a privacy shit show equal to or greater than phone numbers. Either you self-host, which means you have an isp and a DNS provider at minimum who can reveal your identity on their whims, even if you lie on a whois record. Or you use one of the mega free providers with all their conflicts of interest and data mining. Or you use a paid provider which opens up all the payment chain to trace back to you on top of everything else
To get a phone number I can walk to the corner convenience store and, with cash payment and no ID, purchase a prepaid SIM card. I can pay cash to refill it every month.