I suggest Cloudbet, very seasonable Sig deal and I would recommend it.
That's the thing, CloudBet isn't for everybody. I could understand if you don't really won't to make a lot of money on the side, or if you don't have a lot of time... But some of the other signature campaigns are for people who have enough time. For instance, I have a ton of free time on my hand (Because I have no life) so it's natural I'll go with FXO, UP/Down or PD.