I am looking for an ad network, which pays per sign up.. is that CPA? What is the company that offers the highest rate?
well many networks will match rates you find at other networks. Check the list in my link at Relative Cash. There are a ton of great networks there that pay high, like Incent Reward, Epic Edge, Copeac, and Max Bounty. Most will match rates.
Market Leverage pays per sign up. If you want to check them out in my signature I will gladly help you out after your accepted if you shoot me a PM.
MarketLeverage is giving away a lifetime referral bonus for each Publisher you refer to our network! Earn (5%) five percent of the commission for each and every Publisher you refer that signs up as a MarketLeverage Publisher.