

No no no.
The $3 is to incur a cost on would-be spammers. I don’t think most Fedi users appreciate how much work goes into combatting spam at scale. Signal has hundreds of millions of users. Requiring a phone number limits the blast radius of successful spam campaigns. Removing that requirement means making it much easier for spammers to register.
It’s not your or anyone else’s place to “understand” arbitrary decisions I made years ago. Whatever point you want to emphasize is moot anyway: Comments are disabled and users are encouraged to blog independently if they want to remark on something I wrote.
Consider yourself corrected on the “removed” remark.