They are all scammers, living off membership fees, a tax on intelligence, those who charge for group chats are all scammers, report them.

This square has a few people who spend all day doing data analysis to attract you to join their group, charging you a few hundred U for a month. Just think about it, if their data analysis is so impressive, why would they need to make money by charging fees? Don't be deceived, there are plenty of free analysis software available on Telegram.