I like it but I think what you should do is reverse the order a little, I would first get ideas from people (sign NDA etc if people require it), then put a land

I like it but I think what you should do is reverse the order a little, I would first get ideas from people (sign NDA etc if people require it), then put a landing page, get the marketing going for a few weeks, the ones that get the most sign ups, go back to the developer and make that deal, the rest, well, you save your 5000$ and the developers time on a potentially bad idea (could be a great idea, but not attracting enough interest)