When you download some mods, there will appear a notice that let you view the ads to get 1 more downloads.
Method 2: Sign up accound and login.
Happymod supports you sign up with facebook and username. The username can not use capital, it is the most important condition to find your password back, keep username in mind. If you want to login another device, please remeber your password, the telephone number and email can be useful when you need find the password back.