It's generally hard to prosecute because there are plausible other explanations for intent. You don't have any way of knowing a generic laptop is stolen vs used.
Having a unique item from a company you make money covering, that wasn't ever sold legitimately and you didn't acquire from any legitimate source, is absolutely something that could get to trial at minimum, if the company is pushing the DA to do so. You'd end up having to have a lawyer convince a jury that "I didn't know" is believable.
The fact that they chose to give the streamer a pass for cooperating doesn't mean that they couldn't have perfectly reasonably or successfully pursued charges. Choosing not to do so is more evidence of them choosing the nice way.