The solution may not have come from TDS Telecom. Early in August, I noticed that we were not getting any more updates to TVGOS either. I contacted KNME engineering and they acknowledged that they had an equipment problem which they expected to have resolved within a few days. About a week later, we began seeing updates. I believe the host channel for VBI data is still KNME, channel 5, analog. However, the updates have ended again as of last Thursday (there may be some updates, but they are very spotty, if at all). I have contacted KNME again. Hopefully, the problem will be fixed quickly.
I am still pleased with their response on this.