Baremetrics is a great "early release" product, but we don't see development on it, nor even a hint at a roadmap. Profitwell has a lot more features (Paypal support, customer tracing, a powerful UI, etc) and we constantly see new features being added.
I could tell you the same stuff I said when we unsubscribed: Paypal support, a better API, "cancel at period end" support (which Profitwell does have), etc... Wish you well with it, and I hope for your success as I really like how transparently you run Baremetrics, but the product just doesn't cut it for us. And I think you should definitely pay attention to what Profitwell is doing (or any competitors really).