For various reasons related to our Hack Cleaners registered trademark, we ask if you’re going to start a site about Hack Cleaners or related to it that you do not use “Hack Cleaners” in the domain name. We’re not lawyers, but very good ones tell us we have to do this to preserve our trademark. Also, many users have told us they find it confusing.
If you already have a domain with “Hack Cleaners” in it, redirecting it to an “hc” domain equivalent is fine, just as long as the main one users see and you promote doesn’t contain “Hack Cleaners”.
“Hack Cleaners” in sub-domains is fine, like hackcleaners.example.com, we’re just concerned about top-level domains.
We’ve told this to anyone who has ever asked us, we just wanted to make it public so more people could be aware of this policy.
<whine>Other domains are using MainWP in them!</whine>
If they’re not HackCleaners.com, they’re not allowed, and you should contact the owner with a pointer to this page. We see this most frequently with spammy sites distributing plugins and themes with malware in them, which you probably don’t want to be associated with.
This text is from the WordPress Domain Use Policy
with edits made. If you haven’t read the WordPress policy we highly recommend it before purchasing any domains.