Adwords cracking down on Arbitrage
Looks like Google Adwords decided to do something about PPC Arbitrage as well as promoting CPA offers on landing pages with no or little content, webmasters who setup pages with their affiliate links or with contextial ads without any content will most likely be paying more per click, shoemoney covered this topic well on his blog post here.
In short, you need to start masking your affiliate links, use your own redirect system, and put more content on your contextual ads pages.
