Meh. I link out like a mofo, and I only nofollow affiliate links, and I have hundreds if not thousands of outgoing links, and never been pinged by a penguin. But I only link out to strong authoritative sites, too. And given how Google feels about it (regardless of how I feel about it) I don't sell links; the traffic is of more value to me than whatever I'd get for the link.
It's not much point arguing with Google's position on it, they're clear - followed links pass PageRank, and they don't want PageRank to be sold. If you can get more out of your paid links than you can out of the traffic, more power to you. But if you want the traffic, then you gotta play the game.