It's "Whom To Follow" not "Who To Follow".

I.e., WHOM not WHO.

...

Also, I wonder how Mastodon picked those choices to me to (potentially) follow.

#Mastodon #WhoToFollow #WhomToFollow

There is the complete list that Mastodon is suggesting I (potentially) follow.

#Mastodon #WhoToFollow #WhomToFollow

@reiver Inspirational Skeletor is an absolute must follow.
@reiver Inspirational Skeletor is a solid follow recommendation. I support this 💀💜
@reiver I've heard John Mastodon personally picks those out of a tall hat, for each user, individually. What a great man.
@[email protected] knowing people in general... They will get more bug reports if they said "whom"

@julian

We need a Bot that notices incorrect usages of "who" and responds that — it is "whom" not "who".

@reiver why indeed, Sir. I was just remarking upon the very same, while passing idle chit chat with the old lady in the motor car.