“How about one to those that UN-follow that says, “I noticed you UN-followed me after I posted something thought-provoking. Interesting.””
“How about one to those who unfollow that says, “I noticed you unfollowed me after I posted something thought-provoking. Interesting”?
“How about one to those who unfollow that says, “I noticed you unfollowed me after I posted something thought-provoking. Interesting”?”
I maintain that the word ‘that’ is applicable in this sentence.