Lifetime or "All-in" deals (help)

Here's my situation

I used to be a retail Tivo customer from 2008-2012. I then moved, got RCN, and used RCN's Tivos (which had built-in VOD). I am now moving to an area with just Fios and Comcast and will be getting Fios.

I understand that some people are getting retention deals on lifetime service. What kind of deals are people seeing? Would I be eligible as a user of non-retail Tivos? What is the best contact point for trying to get something

Also, I have seen some offers on ebay for used Roamios with lifetime service. If these break down, is the lifetime service transferable?

Thanks