It's a great place to start push notification ads. When I first tried them, they only allowed one push creative per campaign, but when I posted here in affLift about how I was disappointed about this since other networks allow multiple creatives, they promptly responded. After a week or two, I was able to add 5 creatives at a time. That was some really fast response and update on their side, and I love how they listened to their users. Two thumbs up!