[onion2k]

The way to validate your product is to talk to people who actually want the product. If you buy feedback (with money, shares, etc) then you'll be getting feedback from people who want the reward, but not necessarily the product.

Not to mention the fact that if your startup is a success the shares you give away are going to be diluted to hell as soon as you get any investment, so you'll only be getting feedback from people who don't understand that their reward is actually worthless, which would make me question whether or not their feedback is actually going to be useful. I might even ask if you know that and you're try to scam people in to giving you feedback for free while making them think there's something in it for them.

tl;dr It's a bad idea.