Pump groups are very big scams and I recommend to avoid them. Those grow up a lot and people join to pump their money to the admins. This MEGAPUMP group has ~40k members. Admins just buy cryptos cheap and then manipulate stocks.. Those accounts should be banned. Hope these screenshots help to search and ban these scammers.

I don't have screenshots for long-term as I got invite very recently.

Screenshots: https://imgur.com/a/TYi8O