It was often thought that google tracks by its toolbar but there are many other ways of finding sites without links.Whois is one.registrars listing the sites registered for the day is another.But I guess that the fact its getting traffic suggests that yahoo may be measuring hits a bit like alexa but it could also be Trax's domain name thats helping him rank.Yahoo loves kws in domain.I have a spammy
www.best-web-hosting.info Bugger all links and yet ranked no#11 for major kws like web hosting and webhosting and best hosting.So just having kw in domain helps a site rank. I also have
www.triple.net.Only one link to it and it became no#1 for a real estate term "triple net lease" its now about #6 even though it now has more links.