I don't think that there is something wrong with it, and it doesn't mean that this project is 100% a scam. Now projects have migrated to telegram as it is more convenient, so there is no need to update BTT thread. This is normal.
I agree with you. Failure to renew the BTT thread originate from its failure to follow. If there are those who follow this thread, he will give an opinion about the lack of innovation. In the other hand, this place has lost much in its old value. Without signature campaigns, thousands of people would leave.
But telegram is very useful in this regard. It offers the opportunity to track innovations, learn people's thoughts, and ask any question and it is easier to use.