Sourcegraph went dark

Straight-up making all dev work private is very weird and perplexing. Why would their business model (which they had since some time, mind you) require not only a proprietary/"open core" license, which I would understand, but complete secrecy around source code itself? What business goal couldn't be accomplished with licensing restrictions alone? And is that difference in potential income generated by this new secret-requiring business model so big that it justifies throwing away the entire "open nature" of the company that has been a core value for most of its existence?

I've seen this multiple times with companies. Another example which went fully closed in an instant is ForgeRock (OpenAM, etc.). Usually it happens when management caves in to complaints from sales. Who will complain being open makes selling the product hard. In the end they will probably find out it's just the sales people's "excuse du-jour" and even after closing the source they still don't hit their targets.