This is secondary market liquidity, yes? If so, there's unfortunately no demand till series C, and the board needs to allow secondary sales, which competes with the company's own ability to raise capital. We're seeing VCs at later rounds include cash payouts to founders to dissuade secondary market activity.
Also it's not either/or. Participating in a pool does not block the founder from liquidating shares on the open market.
Also it's not either/or. Participating in a pool does not block the founder from liquidating shares on the open market.