Sean from @FaithStreet here. We're focused on Christianity because its a big market (1m+ Christian communities, 60 million people actively involved in Christian communities) that we're passionately involved in, and we think it would be much harder (for branding, for user acquisition, for product design) to approach multiple faiths simultaneously.

For now, churches create free profiles. We're rolling out paid features for churches soon.

I think this is a good approach. Concentrate on getting it perfect for Christianity and then later on you can expand.