brenryd

They have only raised $1.3m, which they most likely spent a long time ago. They have been profitable (self-sustaining) for years. Sure their stock is not liquid, but there is a strong case that they could move towards liquidation (IPO) at a $5 billion or higher valuation.

Discord could be interesting as Amazon has already shown interest in the gaming / streaming / online community space with their Twitch acquisition.