I have used adworkmedia. But they don't have desktop campaigns for India traffic.
I have tried purebits.net. They are showing campaigns. I have completed a survey. Even after completion of survey my EBook was not unlocked.
Any one suggest me, which cpa network I should use to lock my EBook.The network should show simple email submit forms instead of big survey. After filling form my EBook should be unlocked to my readers.