Not unheard of, Adelaide paid part of Josh Jenkins wage this year to get him to the cats, what I don’t know is if you have to count that extra 100k (or whatever it is) in your salary cap? If you don’t you’re effectively buying a better trade.
Edit: for what it’s worth, I am on the “mad to trade Hogan” side of the argument, but must concede the press has managed to paint us into a corner, if we do trade him it’s because we couldn’t sort out his issues, if we keep him it’ll be because he’s damaged goods and no one wanted him even with us offering to pay part of his salary. Either way the worst will run with it for weeks.