It's weird to me that the Dursleys never warmed up to Harry, even if just for self-serving reasons. All manner of magical stuff goes down before their very eyes, and still they treat the boy like shit.
If not from fear, then why not greed? "Hey boy, is there a way we can make money with this magic stuff of yours? Yes, we know you can't do magic at home, but what about at school? We'll owl you broken antiques while you're there, and you'll do your Reparo thing, yes? Earn your keep, and perhaps a little respect boy, eh what?"
