Nothing wrong, just that you're going to have difficulty finding advertisers that will agree to this type of advertising. You're not in any way solving the problem of finding relevant audiences for their ads. You're just throwing an incentive for random people to do things for prizes, and hope they will buy whatever the ad is about. But users just want the free goods.
The problem is not how to make users interested in an ad. The core problem is connecting an ad to a relevant audience. You can't fake interest in an ad that's not relevant to what you want at the point. People have tried that with FB ads, but the CTR are horrible, and people get pissed when they see the ad had nothing to do with the actual product.
The problem is not how to make users interested in an ad. The core problem is connecting an ad to a relevant audience. You can't fake interest in an ad that's not relevant to what you want at the point. People have tried that with FB ads, but the CTR are horrible, and people get pissed when they see the ad had nothing to do with the actual product.