Current state of the mobile PPD/PPI market?

Can someone give me the rundown of the current state of the mobile pay per install market? I am curious on what the current rates are for mobile installs and information about the ecosystem compared to desktop.

Thanks

It's more lucrative than normal ads but much more competitive, certainly harder to get apps in stores for longer. Seems to be more quality control.

A few companies pay well, but its not there with the desktop rates. Depends on the long term revenue that the end company will be able to monetise and I'm guessing in near future the rates may go up. And even catch desktop possibly, since mobile adware will probably become more profitable.