It depends on what the message of the member there. We can see the difference if their message is real from people side, or just to fulfill the requirements of a telegram campaign. So pay attention to what the chat is about.
But telegram is not a factor about successful project
Most of telegram groups that have reached more than 100k followers are bot and fake accounts. You can see they just said "hello" and "hi". So Don't trust the projects by their telegram groups.