It's legit, and fun, however if you have any technical or account issues, there is no real email or phone to get help, and you can get locked completely out, from even making a new account.
MeWe.com is a legitimate social media platform. They sell some features to collect revenue but you can operate a group for free. I have been.onsite for over 2 years and have only had 1 issue with repeating events, but that is really a non issue if you just create each one.
It's a very legit, social site. They are selling anything or asking for anything. It's another place for people to get online, share and chill like other sites used to be.