I think this has the potential to be successful if done correctly. What's your business model, are you charging or taking a cut of the equity yourselves

We cover all legal infrastructure and management costs. In the exchange, we reserve the right for a 10-20% (depending on pool risk) carry based on pool outcomes.

Is there a voting mechanism? who picks the companies

It's peer selection based on ranking. We are moving to a version of Gale-Shapley stable algorithm for pool construction