The studio is only for the best animators on the website.
It is very difficult to get in and is limited to very few people.
Asking to join will not grant you a spot, the only way to join is to be invited, and very few people will be invited. IF YOU ASK TO JOIN YOU ARE PERMANENTLY EXCLUDED AND CAN NOT BE INVITED.
If you are in the club, you are allowed to invite anybody you choose to, but don't invite animators unless you truly think that they are some of the best on the site.
Feel free to check out the profiles of members, the projects made by them, or follow the studio to show support.