if the bounty channel have no one on the team or the bounty manager is not login anymore in this forum this is a warning sign for bounty hunters to consider, do you have similar experience like this.
You are just talking about one of the obvious sign of future scam. There are many similar things are available to identify that who are all going to pay you and who are all may run away by keep on informing you that "ICO is just extended and keep working for some more time". In an ICO, everything should be as per plan and should be informed well in advance otherwise we can go for suspecting them. The exception should be like this, the changes to already planned things should be announced in right time with proper reason.
Maybe it is major part that can destroy the project or in other hand every one if the team leave the project. No update means no progress.
Yes, it will lead to destroy the project like it will be leading for earning bad reputation among the crypto community. Twitter for announcing own updates whereas telegram/discord channels are for interactive platform for having update. If they are silent, that will end up in scam in 99% of the cases.