"PR" means "public relations" in this context, not "press release." PR is deployed by capital to influence public opinion, drive interest & investment, etc. It is true on its face AI is in a PR-driven hype cycle just like crypto before it. Having a hype cycle doesn't mean there's no value in the thing being hyped, only that its perceived value is being driven higher during the hype cycle.

For "threadboi", here's a good explanation https://letmegooglethat.com/?q=threadboi