I would like it if my skysa bar could already have intergrated membership when I add it to my social site, ning, spruz and wordpress/buddypress can do it. If you added a skysa api call state under social login's area, you may be able to just use the code on the end of the bar like wordpress self hosted and buddypress does, to have integrated membership on your site.
If people have to sign up to your skysa bar to use it it can take away from the experience.