One obvious scam, for example, would be someone trying to perform some reputation-destroying action and laundering domains to do so. Another might be creating a bunch of SEO slop domains to try and farm ad revenue on various topics with AI content; Google seems to be doing better at downranking those but I'm sure it's still a thing.

I suppose it's possible that someone's just running a charity Wordpress-like operation for their friends who all want websites.