Well then.... definitely will slide on EWA if they are going to run internally against you....
All networks will run internally against you - even the ones that say they don't. Higher payouts mean they can pay more for your traffic and still be profitable. Greed is a powerful motivator - wouldn't you do the same?
The only way to avoid it is develop your own product or start your own network. AM by definition will have ups and downs because of the business model. We take advantage of market inefficiencies, and once those inefficiencies are closed the offers are no longer profitable, and you have to move on to the next one. Hence, the constant grind required to do it.