3 questions

1: We have a directory/profile add on. It generally requires you use a complicated shortcode and accept things the way they are or do custom PHP development to use it as a basis for a custom directory experience. https://www.paidmembershipspro.com/add-ons/pmpro-member-directory/

RE a live demo. We have one here: https://demo.memberlitetheme.com/membership/member-directory/

2: No. You’ll need another plugin for this. Figure out what you mean by “follow”.

3: Here is our FAQ RE adding a custom gateway. It takes a lot of development: https://www.paidmembershipspro.com/gateway/adding-a-new-gateway/