A/B Testing ad units is an amazing idea, which most publishers completely miss out. AdPushup does this very well and I was able to see a 86% rise in my AdSense revenues. The team were very helpful and quick to reply to any questions that arose.
AdPushup as a tool effortlessly plugs-in to our WordPress blog. The A/B testing is vital and was far too easy to ignore before. Never again as the results speak for themself. AdPushup, thank you.