Honest question: If Recurly/Spreedly/Chargify/CheddarGetter is satisfactory for my recurring billing, why would I need Samarai? I'd likely just bring a merchant that has its own gateway to one of those services.

I'm currently looking at places like BrainTree which do it all (merchant, gateway, recurring) as they look far more enticing than gluing together a bunch of companies.

I suppose I'm new at this, but it's all very confusing. Why should I choose you + some merchant + some recurring billing service over BrainTree?