Other examples of Stubhub e-mails include "fieldmilestone" and "rolodexinfo". I believe that Stubhub is using old domains, probably from some list that their registrar is providing them. Sometimes, there are blocks of patterns, such as the color/etc. one - but they're probably doing this to avoid getting spam-filtered by people's mail clients, not to try to hide from Ticketmaster or anything else, and I doubt the naming is something they are defining.