GPLv2 was specifically mentioned so i just assumed that was the reason that they asked for the rights of my (tiny) contributions to the project. But yes you are right. They actually did not spell out that they will do it.
Damn. I bought a TBS MOI box a while back, which runs TVHeadend but I've never got around to getting everything set up. It sounds like a great project and I was really looking forward to using it after fighting with MythTV in the past.
shouldn't be a problem; tvheadend is still going strong and won't be abandoned just yet. It may see slower updates while the maintainer hopes for more developers to help