Since default options are somewhat confusing, I've removed ability to start a public squad (from Invision docs: Everyone can see these clubs and their posts. Members can participate within that club without the need to join), so now the basic option is open (Everyone can see these clubs and their posts, however you have to join the club in order to participate. Anyone can join) - there's a proper join button, and leaders have an ability to invite people. All the public squads changed to open now.
Btw, the other options are:
Closed - Everyone can see the club, and can see who is in th