These are spam accounts. Their about me says "spam account" because recently a couple of moderators have been editing the original content (which may get indexed by search engines and benefit the spammers' SEO) out and applying the change network-wide (we can only destroy the account on our site, so editing the profile is the only way to do something about it on other sites).
Don't bother paying much attention to them. There's still disagreement on the practice of moderators modifying their network profile but they are just profile spammers. You should ignore them; some moderators like myself destroy them, some hunt them down actively, and some just totally ignore them. They're not really for users to see (probably) anyway, just to abuse SE for search engine indexing.