This is the exact thing that has happened: "Namebio had the chance to log into her Afternic account and see the sales history"
https://namebio.com/blog/swethas-sales-the-truth-may-shock-you/
.com is the king, but if you have a strong one-word domain, then you can sell that for higher amounts in other TLDs as well, including .xyz. In .xyz the one word must be related to crypto, web3, tech, finance, metaverse, AI, investing.
I don't know why is it a surprise that some companies have $20,000 - $100,000 for a domain name. This is not a lot of money for a lot of startups. If they can't afford a great .com name, they might buy a one-word domain in other TLD, such as in .xyz. It happens in other TLDs, too, including .io, .ai, .net., .vc etc. Do you open threads claiming that all these .io, .ai, .net etc. sales are scams?
So these one-word .xyz names are valuable, and if a single person owns the majority of these domains, then of course the sales reports will originate from the same person.
You can find a lot of developed, real business websites using the .xyz TLD on this blog:
https://gen.xyz/blog
Also look at the W3techs data:
https://w3techs.com/technologies/overview/top_level_domain
This means tens of thousands of real businesses use the .xyz extension. W3Techs reports only the actual, live, developed websites. According to their stats, the .xyz TLD is more popular than for example .ai, .app and .us. Again, these are the live, developed websites only.