Would be great to have a billing/payment system to sell things like projects, apps and templates. Got some experience with Stripe Connect and I think it would work nicely here. An integrated invoicing system would be a plus.

Allow merchants to send public events info to Segment from UC. Things like ‘Product added to Cart’ or ‘Order placed’.

Allow users to sign up on your websites with a username & password. Enable/disable access to content/pages for different user types.