The purpose for open sourcing was to have other implementations and to get community support. Neither happened so that plan was aborted. The code is still available though.
Thanks @memo however it's still unclear what you get by keeping it closed-source. Would open-sourcing it conflict with future plans to turn it into a profitable venture somehow?
I wish there would be a better alternative to reddit and rbtc but I can't recommend people to switch to a closed-source platform unless there is a good reason for it to be proprietary.