Don't really need to post this because he will survive anyway, but a big reason for all your neutrals out there for Chad to survive should be to stop Jordan and Sam getting their way. Chad is clearly the alpha male in the house and both of them, Sam in particular, are threatened by him being there. Chad going would also make the chances of a Sam and Amelia romance happening much more likely, which would be pretty brutal to watch.
Can you imagine that little twerp Sam's face if Chad goes? He'd take it as some kind of acknowledgement from the public that they want him and Amelia to be the relationship, not Chad. Can't let that happen