So, he's using a domain without an SPF record (allowing it to be spoofed), and Cloudflare hosting which is notorius for spam and botnets. The same domain name with .RU extension is already associated with generating spam.
Furthermore, his homepage is chocka-block with links, that anyone could mistake for a link-farm / spam page.
There's no grand conspiracy here, just a webmaster who's not terribly savvy and some overzealous AI heuristics at Spamhaus, FB and Twitter playing it safe.
Nothing more to see here, please move along.