Why dont you guys do your research?
There are apps that pay you in giftcards for downloading other apps
Do some research before next question
I think you should do yours. With the amount they're selling you would need an army to earn that much from apps. Stop being naive.
Stop being an idiot, anyone with a relatively small amount of investment can buy about 50 vps in bulk, install an android emulator and run their method in mass
Not everyone is narrow minded and wont go the extra mile to make a decent amount of money
When you are from certain countries, you have to go the extra mile when making money online, you wouldn't know