KickstarterForum.org

You have not provided anywhere near enough information to for us to judge. You will need to make people a very compelling offer to get them to sign up pre-launch. You haven't told us what you are going to do so we can't judge. If that isn't blindingly obvious then you should consider whether you hav...

This is called a raffle.

There are laws restricting how raffles can be operated in many states and countries.

http://www.rafflefaq.com/united-states-raffle-laws/

Doomed. Why would anyone install an app that will show them adverts and does nothing else? The reality is that they won't. People will sometimes install an app that does something useful to them that also shows adverts. Facebook can do targeted adverts because they have 900 million users. Stick a pi...