I don't know how they can pull it though, that Adam Curry guy is a well known figure based on his search results, other than that some of their team members are showing up with good reputation as well. So if they tried to scam people they would easily be find by the authorities. Don't you think that there is a possibility that they just switched telegram channels as they might be avoiding trolls/spammers in their old channel? I have seen it in the past and only a few members (the ones who left) have received the link for the new channel.