Scent doesn't count as chum, so why would it be bait ? isn't there bait in most scent ?
I believe Pro-Cure is the only or I should say main one that actually grinds up bait to make their scents. I've been in their "stinky" factory numerous times when I lived in Salem and watched the process; owner Phil Pirone is a good friend.
I read about one company, East Coast, who uses ground up night crawlers to make a Bass fishing product that is sold in a form like ChapStick. I don't know who they are by name. I would guess others will start or should start to use some bait in their scent to try to catch up with the number 1 rating of Pro-Cure.
Should have Googled it first... there is another one sold in a tube called Liquid Meyham, found that at Amazon.