How do you actually make any money though? It costs you money to provide this service. Where is that coming from?

Two answers:

• The operating costs are very low, since all Easyful does is email your customers your content when they buy it.

• Our team at nicer.io is primarily a product agency, so when we make our own apps like Easyful, SimplePerks and Smallchat, they don't have the pressure to be highly-profitable. We often end up getting good connections, agency customers and referrals from these apps, and keeping them running and supported is pretty low-cost for us.

How do you mail files that are several hundred megabytes in size? Also, you need to store these somewhere, which costs money. I might be wrong, but it seems you missed a few critical parts of why people use Gumroad. You should take a closer look at their audience, there is a sizable segment of people that sell 3D models, textures, etc.

Yeah. And what about analytics and stuff?