They have fixed costs (most support comes at the beginning when people are integrating) and low marginal costs. Once a merchant is integrated and using Chargif

They have fixed costs (most support comes at the beginning when people are integrating) and low marginal costs. Once a merchant is integrated and using Chargify successfully, only then does it become inexpensive to add another customer. Besides, once you get your 11th customer, you're paying $9 apiece, not $0.20! Lesson learned, if you have a small number of customers, Chargify maybe isn't for you.