I mean the same model they use as far as publishers are concerned i.e. earnings per click.
You would think Microsoft would be competing to take away share from adsense, but I haven't heard too many good things about them. And I am not even sure they are even available to UK publishers.
The only viable alternative I have seen is Chitika. But Chitika is pretty small and their inventory isn't nearly as large as adsense.
- They have an image next to the ads which isn't always ideal when you want to embed ads aligned next to content.
- They only show ads to search visitors from the US and Canada. What about the UK? Most of my sites get second most number of users from the UK (behind the US) and I am sure this is the case for many other publishers.
The performance of adsense this week has left me in a situation where I wish I could just replace their code with that of a like-for-like competitor. But at the moment we are stuck with them because they are still the best, and also in the hope that things will return back to normal in a day or two.