Agreed. There's such a whole world of unreported 'sponsored' or otherwise products, and streaming is a big part of it. And no-one is immune.
When the cheesegrater Mac Pro came out, I watched a lot of videos on it, particularly on YouTube in the photo/video segment - I was planning to get one, and while I had other uses for it, I'd be doing a lot of photo work on it in my recreational time.
Quickly I noticed just how many of the big name streamers had launch day or very early access to the Mac Pro and Pro Display. Sure.
And then I noticed how each and every one spun it as "I just got mine", "just bought one", and so forth. All organic, they'd have you believe - not a single one said "Apple sent me this". And yet...
By "a curious coincidence", every single one had seemingly ordered the exact same spec: an 18 core CPU, 384GB of memory, the Vega II Duo GPU, and 8TB SSD, and the nano-textured ProDisplay.
So what, you might think, that might have been the quickest shipping order. Also an $18,000+ computer, $25K with the display.
And if you're a photographer, even if you're working on medium format digital, and 100MP images, you in no way shape or form need 384GB of memory, or that GPU. For me, LightRoom / Capture One and Photoshop all barely sweated on my 12 core 192GB W5700X variant.
So then Occam's Razor applies. What are the odds that, even of just the 8-10 streamers I watch, they all got exactly the same spec Mac? Or is it that that was the spec Apple was sending to high popularity streamers?
Except not a single one even implied that that might have been the case. And I don't doubt that many or all bought their own at some point. But I suspect it was mostly "got one from Apple, talked it up, and then substituted it with my own when it arrived".