Trending: Android Earning app Business

Hi, I'm planning to create a android app like cointiply. App will have lots of user who will watch videos and complete task like download app/game, complete surveys and many more which will generate the money.

Now There is few issues I need to clear before start:



1.What are the good ad/cpa/survey network to monetize the
2.A lot of user will use residential proxy ip to earn better (1st world country user get paid more) and I won't be able to stop them. Is there any chance ad provider will ban my account?
3.How does keyword install works? Can I get it from pico/microworker
4.Is there any other matter I should be aware of?

I'm doing my own research but I would appreciate expert comments on this.

I have decent experience of digital marketing.

Thanks

It will all depends on the region of your users. If it's from 3rd world country you won't make much money.
I had developed similar app for my friend.