It's just facebook trying to purge as many conservative activist types without strait up banning them. It's a softer take on censorship in a ever shrinking base to please the extremists. It's a growing trend. They don't want to be seen as encouraging political discourse, while trying to look better than Twitter to the rest of us. See, we won't just strait up ban you for not being in our camp, we'll just offer to pay you to go away. Same results, different tactic.