This is unfortunate, but more unfortunate is the fact that Facebook seems to be a moving target for policies like this.
This also reads like Facebook is saying “We don’t want anyone to promote interaction on their platform — except ours.”
That being said I’ll bring this to the team to see if we can do anything about it.
EDIT: @anon20593648 unfortunately it seems these rules are inconsistently enforced. Our recommendation at this point is to turn off the sharing badge.