There is no original idea. Just start building then pivot later.

I would like to see proof too. At this point I’m just so curious.

Hi OP, I actually just created a service where startup founders can exchange feedback for each other product and services. You can create a post there and a few other guys will write feedback for you. In order to read those feedback you will need to write a feedback for other guys as well, so it become a fair exchange. If you are interested, I will share you the link.