One of the problems is this line in particular: The term ‘participation in a venture’ means knowing conduct by an individual or entity, that assists, supports,

One of the problems is this line in particular: The term ‘participation in a venture’ means knowing conduct by an individual or entity, that assists, supports, or facilitates a violation. "facilitating" means "make easier or less difficult". Hosting a website that allows people to talk about things, potentially including sex trafficking, certainly makes it easier, and under this law, any such website would be liable.