@strypey ...This probably comes across crankier than intended. But you can't expect all implementors past/present/future to get on-board with something that doesn't affect compatibility. And if you look at @fedilist, there are now a lot of Ghost/Wordpress servers popping up (to the extent that I had to special-case Ghost in the bot).

But there are 3,109 instances with open registrations, 6,444 with closed registrations, 4,054 invite-only, and 4,203 approval-only. There are very few with open registrations nowadays compared to the rest of the network.

The solution to the spam problem is user-centric controls, but it's much less of a problem than it used to be.