CPALead is very good alternative to other pay per install programs which are used as content protection.
CPALead has the same function and you can protect your content with them using very effective content lockers.
That gateway will give option to the visitor complete some offers (survey, email submit, …) and if they do, you get paid at least $1.
This way you can make much more than some other pay per install program using similar content protection gateways.
CPA Lead has also other tools like exit traffic or you can use it as classic CPM network where you get targeted banners to your website. Other are, Download widget, file locker, link locker or virtual currency.
Newly CPA Lead has also content lockers customized for adult traffic so you can lock your adult website content.
There are all the time new offers so also repeating visitors are counted and also visitors from all world so you can convert any traffic. Payments are in Paypal, Check or Payoneer and minimum payment is $100 which should be very easy to reach.