This is complete conjecture, but one of the key reasons may be to cash-out the founders/employees. Companies don't usually cash out their own founders, but inve

This is complete conjecture, but one of the key reasons may be to cash-out the founders/employees. Companies don't usually cash out their own founders, but investors sure as hell have the right to buy the founder's shares if they want. If they're making so much money but don't have a sale in the near future, the founders might have decided to take a significant stake off the table...