twitter/x/bluesky - a big tech company owns your data
mastodon - a grassroots community organization owns your data
zulip - someone you've met personally owns the data
your blog - you own the data
(and yes these are a bit of a category error, but to achieve privacy maybe we should broaden the category and sacrifice reach)
Because you have "possesses" (which can be anyone) vs. "controls?"
Twitter - single point of big company external control
Mastodon - One or multiple unverifiable fallible likely grassroots, points of external control
Bluesky - Once out, merely the illusion of control, because your data is out there, verifiable?.
twitter/x/bluesky - a big tech company owns your data
mastodon - a grassroots community organization owns your data
zulip - someone you've met personally owns the data
your blog - you own the data
(and yes these are a bit of a category error, but to achieve privacy maybe we should broaden the category and sacrifice reach)