I worked with them last April, Frankly, that wasn't a good experience, they have a ton of traffic much bigger than any other traffic source, so you need a big budget to test any offer, I've tested them with Monetizer offer, with an offer that converts well for me on another source of traffic, but when I try it on Active revenue I've a bad result, also with easy converting offer ( Evadav push-sub ), traffic was very bad.
However, there are some positive things like source optimization and bid optimizator and especially like Support, my advertiser manager was very helpful and ( Vera ) and The good thing is when I asked them for refund, they immediately returned it to me.