Have you ever done that?

hi gang...i have a product that is rolling out before Christmas...sure it is not the best time of the year for that but i decided to use the Christmas period to include a present with my offer.

I decided to create the product to teach people how to make money with writing without actually writing anything. When i was half way through the product creation i had an idea for another product ... however that one required much more money to start and i thought i would try to kill 2 birds with one stone.

I was thinking of doing the following.

Buy my tier 1 product ($147) and get $500 back from the service your money helped create.

Buy my tier 2 product ($147 + $50/month) and get $2000 back.

Buy my tier 3 product ($147 + $197/month) and get $10000 back.

It would be contingent to "if it works" but i am reasonably sure it will, as just on that forum i know there is a lot of people that would be interested.

Has any of you done something like that? Offering a stake to a future endevour to the people that buy a product?

If you were interested in the product would a bonus like that be enough for you to make the decision to buy?