A little confusion on your example, it basically shows a case where an investor-potential whom a developer can't get in touch with, to convince him to invest, are now within reach as the developer ask something to the said investor-potential using your platform, thus gain his interest? And what would the question be, then? "Hi, can you review my proposal?"
You are right. The developer gets the opportunity to contact the investor, but no more.
The developer should carefully approach the choice of the investor (read the description on his account, use the filter with AI). Smart developers usually know in advance who they need from investors (so they can do just a search by name).
"Hi, can you review my proposal?"
Yes, the question may be like this. But I would add it.
We don't guarantee that the investor will be interested in the project. But he will write his opinion and this will help the developer to improve his project/idea.
We just give the opportunity to contact. And what users will talk about and what results they will get is their business. We only control the quality of the answer (it can be negative).
So they will have to pay to get an investor? Sounds a little counterproductive to me, especially as you also claimed yourself that the price won't be cheap. Plus, there's no guarantee that it will be the investor himself that read and give advise. I would imagine some of those expert investors run a lot of business and would probably have no time to read three to five emails asking them to read their proposal because of the payment (that's probably seems small for the investor, but big for a startup project). Afterall, that's why CEO and other businessman have PA.