The issue is that for the past 10 years, if someone typed in "handsonwebhosting" or "handsonhosting" or "hands-on web hosting" or combination there of, our main site "http://www.handsonwebhosting.com" would show up on the top of the list. This is still true for Bing and Yahoo.
Up until just the other day (between 1 and 3 days ago), google now no longer shows "www.handsonwebhosting.com" as the number 1 spot with our regular site links etc listed below it. Instead,
http://billing.handsonwebhosting.com is now listed in the number one spot.
www.handsonwebhosting.com (the main page) no longer shows up in ANY result unless you specifically type in the name that way. It does still display folders within the site, and subdomains, so it's not as if the domain has be blacklisted, but just the home page (index.php) no longer shows on the search results.
No changes have been made on our end have been made. The only thing I can even remotely think about is that Artashes put a link on the TalkFreelance.com website the other week and it's not a "nofollow" link. Since it's at the bottom of the page, Google MIGHT think it's a purchased link.
That's the only thing I can see different happening over the past 6 months. Artashes, maybe we can turn that into a graphical link instead of a text link? Not sure.