Unless... It could've been an oversight, coding error, server malfunction, or any number of things that let something meant only for MSOs occur on retail units. TiVo DOES make mistakes, and they aren't immune to system malfunctions. An example is how some people used the new online TSN transfer (when it was first new) to transfer lifetime service between units, when that wasn't supposed to be possible. It happened. I missed that small window of opportunity by a few hours... Let's not forget the legal might of TiVo. They do reserve the right to change their TOS/policies/rules AT ANY TIME, and will give you 30 days notice. They can always grandfather those that took advantage of it, and allow them to keep their upgraded unit in operation, or give them a choice of putting the original drive back in and in return, not voiding their warranty. Have you read the new TOS and policies, which we have less than 30 days to opt-out of? There are LOTS of mentions in BOLD PRINT about them leveraging punitive penalties against users, up to, and including TERMINATION OF TIVO SERVICE, as well as punitive financial penalties.