I don’t mind paying five dollars for a game that I like. That is, I don’t mind going to a shop and pulling out Mr. Lincoln. However, this does not have the anonymity of cash. And I do think that the game should only be advertizing the premium features under a button called, say, “What does premium get me?” rather than “try for this amulet, oops, no it requires premium.”
Another consideration is this. I don’t think that Kongregate badges should be easier for those who have spent priviledge money. In other words, a badge should only work if premium content that affects gameplay is disabled.