There are many possibilities of financing:

1.

1. You have personal interest on this development and strive for share.
You are willing to invest amount x.
With you there are other sponsors who are willing to invest amount x.
The minimum amount of starting the project is achieved – the project begins.
According to the amount you invested you get a share on the development
After beginning the development many other interested persons invest into the project so a mass-production is possible.
Due to the high demand a producer buys the development.
Previous investors (according to their investment), developers and Innovators have a share on the profit.

2.

You like the idea and want to support it.
In this case you are a supporter.

3.

You like the idea and want to support it.
The required amount for financing isn't achieved.
You get your money back.