My understanding is the same, Skoda pay for the service for the new cars they sell, the owner doesn't pay an annual fee, we'll not on a 2017 car. I think the system is different now.
So if Skoda have stopped paying I would expect other cars with the same integrated Sat nav to stop TMC as well. I am convinced it happened after a Skoda service. If they plugged their computer into the CAN then did they up date the software or conversly has it stopped being broadcast on its carrier Classic FM.
If you research on the web it has stopped before and then started again. Skoda dealers should know........... I asked service dept on Thursday and will call in during the week when I get back to Cheshire. It is possible that they have it written into the T&Cs that they can stop it.