Other one is https://twitter.com/emollick it's an entrepreneurship professor but he is good at prompts.
I'm pretty sure the best places to follow are discord channels but I wouldn't know because I'm not on discord. Also some of the mastodons are probably better than twitter for good ones to follow.
Hacker news can be good, one from OpenAI posted a link to a scaling analysis here yesterday for example https://news.ycombinator.com/item?id=35548408