Ticketmaster was written by OzTiVo and required by 11.3b8 software to stop the "tickets" that a TiVo uses expiring which would put it in a very restrictive mode.

TiVo as a goodwill gesture removed expiring tickets in 11.3b10 so that a non modded TiVo would continue to operate without the official TiVo server.

The software patcher used in the modding process determines whether a TiVo is 11.3b8 or 11.3b10 and applies Ticketmaster accordingly.