Well, there are players like me who just don't like red side. It doesn't fit my characters, I don't like being a villain, and I really don't like some of the stories there, like "saving" people to have them killed and chopped up for zombie bits. Or to be written as a complete dupe and idiot where everything was a trap. You could offer 5x XP and 1000X inf and I still wouldn't because I wouldn't enjoy it.
There's just nothing really about red side that appeals to me. And I don't think I'm the only one.