Followed 5 of this groups on telegram for more than 2 months, just for fun not with a specific interests. There was just one thing that I have noticed after every pump they make: I post for the administrator of the group or something similar (I'm not sure) that encourage all the group members when the things was not going in the way that wanted. And believe me this encouraging posting appears after most of their pumping attempts, meaning that most of the group members didn't win for the pumping. After two months let me advice you: Stay way from them!!!