Traditionally there are three reasons to go public: (1) need capital, (2) founders or VCs need to cash out, or (3) have 500+ stockholders. Reason (3) has driven some otherwise cash rich companies with somewhat patient VC money to go public, and I expect it is what the SEC is looking at here. If pools try to buy, the SEC may look through the pool structure and count each of the pool investors as a separate investor, making it hard to keep under the 500 holder limit. A few non-tech companies that do not need capital have recently gone the "perma-private" route, with private exchanges set up to facilitate trading, but that is difficult to do, especially as more and more employees join up and expect stock and push on the 500 holder limit.