How this work?
Since Apple has add a new app call TestFly, all the app developers has the facility to add tester from all over the world.
Is easy and secure for both sides, you do not need to share nothing else that you are not sharing in Facebook already, not need to pay for it, nor you gonna get pay , but you may get a first deep to famous app from developers.
How to do it?
Just fill up the form
Zuky Developer 