This "method" has been here for years. Used to do it like 4-5 years ago with an app called "JunoWallet" (if I'm not mistaken).. total waste of time, you need to put in A LOT of effort to make almost nothing.
The only way to make money with this kind of apps is by having people using your invite code! I had like 30 people under me.. at the time.
This "method" is good if you need some money in the beginning and if you're extremely reluctant in investing some money into IM, but then again .. if that's your way of thinking then stay away from IM.
Remember that the guys providing the App and paying you are doing so only because they're making more money thanks to you.. . Those guys are the winners, that's a "Method", but just using the App is not.
Best Regards,
Jaymien.