Default behavior seems to have changed recently, or at least be inconsistent from other
objects that can be “Followed” so that comments will show in player’s message feed.
From chat discussion with Eli, we believe Lab, Script, and Blog are objects that user must set “follow” manually.
Whereas Player-created Puzzle, Groups(joining, not creating), and Lab Solutions appear to have “follow” as default.
There may have also been a change when leaving a “comment”.
Eli did a test by leaving a comment on a puzzle and it was not automatically changed to “Follow”.
He believes it did automatically change in the past.
My request would be that all user-created objects have “Follow” by default, so that
the user is sent comments on that object.
I have less concern when leaving comments, but understand that some users want that
action to automatically change to “Follow”. (Delete comment would presumably automatically change to “Unfollow”).