There are some very explicit images for the default prompt when one scrolls a bit around there, can't imagine that OpenAI would not filter these out.

The website has a '©Open AI™ 2014 - 2023' text in the bottom right if you go to another page. Maybe this supports the domain squatting / trademark abuse hypothesis?

Yeah, this is deliberately misleading. Note the use of "Open AI" vs OpenAI. I wonder if the aim is to provoke legal action over the right to use the phrase "Open AI" and have a "OpenAI isn't open so why do they get to call themselves that" discussion in court.

TL;DR activism is my bet. Or hoping for a settlement to avoid said discussion and transfer the domain, perhaps even more likely.