Is There Any Other Twitter Pay-Per-Click Ad Programs??

I went to twitter.com and it looks as if they are looking for a way to monetize twitter for it's members. I would just say that I would wait for that, or try to contact twitter and ask them if sites like that are illegal and could possibly cause your account to be deleted. I was thinking about doing something like the twtad site you mentioned, but first I'm going to contact twitter, that is if I do feel like doing that. I'd say it's illegal to do that, similar kind of to what workfromhomehq is doing / or was doing ... not sure which.