Th problem with adsense is that it is extremely easy to get banned, but it's also the easiest way to make money by far. So when I'm making lots of money with adsense Im hesitant to even call it revenue because I know that for any number of reasons my adsense account could disappear in a nanosecond. I have read countless stories of publishers who have followed the rules getting banned from adsense. In addition, the payment approval process is also extremely long so you may have up to 2 months of revenue voided. Then there's CPA but these suck big time compared to adsense. It's like a ton of clicks no one filling in the damn form.