in the spirit of the holiday season: fedi uses activities like gift wrap. they unwrap them to get at the side effects inside, then discard them. activitypub is for publishing activities, so it's like gifting someone gift wrap. if they unwrap it, they get nothing. the gift wrap is the gift itself. the type of gift wrap you use says something all by itself. but a lot of people don't appreciate gift wrap. if you gifted someone gift wrap they might be confused and not understand it.