Even founded by customers, the marketing département of CIG use the same tools that the gaming industry. Evocati are under NDA because their builds have more bugs than the normal PTU. They gave access to this build to streamers for the MSR, nothing abormal to make them not post those 'extra' bugs. If streamers want to post bugs, they can find a whole bunch of them in the PU.
For what I know, the fact that SC has bugs is not hidden, you can find a lot of streamer's video showing them (you can follow this thread if you want to see all of them).
That's not the issue at hand. You were comparing apples and oranges, mainly, publishers who are taking a financial risk, vs. CI, who burden the customers with the risk of failure and forfeiture of funds . . . such as the ridiculous "pledge," which makes it sound like something you do for free, instead of calling it what it is: a business transaction.
That's my primary beef. The customer HAS already handed the cash over, quite a lot in some cases, so they have every right to know what's working and what is not. That's totally different from future buyers of, say, Cyberpunk 2077. No money has exchanged hands, certainly not to the tune of thousands of dollars.