[cbozeman]

I suspect that's a big reason. Remember about a decade back or so when Fox had four of it's upcoming television shows leaked onto public and private tracker sites about six months before their actual premieres?

Lucifer, Minority Report, Blindspot, and Carmichael were all leaked, and those shows were on different networks, which means it was likely a third-party company that was doing effects in post. I don't recall if it was ever sussed out what exactly happened and now they all got leaked, but it definitely made the industry a bit warier.