Supposedly the debut of the Bolt was accompanied by a policy change that meant if a Series 1, 2, or 3 is not currently subscribed, it could never ever again be subscribed by anyone.
Which pretty much destroys any resale value they might still have had and sets up the possibility of a lot of buyers who didn't know about it getting angry with a lot of sellers who didn't know about it.
Yet someone seeking to sell a 648 got this from them.
(I've redacted as much as I thought necessary with * and x)
This email is in response to your request to end service on your TiVo device with TSN: 6480031802124xx. This service cancellation will be effective on 2015-Nov-07.
If you wish to reverse this cancellation, please call us (at 1-877-367-8486) prior to the date listed above.
If after cancellation you wish to reactivate service on this TiVo device, you can do so at any time by logging into your account at www.tivo.com/myaccount and selecting 'Reactivate this Device. If you no longer will be using this TiVo device in your household, you easily can transfer the device to a friend or family member. A Tivo device is a great gift to give at any time of the year.
Service cancellation summary:
TiVo Service Number : 64800318021247xx
Request Date : 2015-Oct-21
Cancellation Date : 2015-Nov-07
We hope that you enjoyed using your TiVo device and that we can welcome you back sometime soon.
The TiVo Team
Not sure if the bit about transfer to friend or family is "at any time" or "as long as you haven't deactivated it yet", but it otherwise sure does seem to contradict what I've seen posted around here lately by others who've spoken with TiVo.
Don't know if it has any bearing whatsoever, but this is the first time I've seen a 648 TSN that wasn't 648-0000-xxxx-xxxx or 648-0001-xxxx-xxxx or 648-0011-xxxx-xxxx