The same way you bill for any other software services. Seriously: No startup or SAAS is really charging for their actual software. The whole reason an MVP work

The same way you bill for any other software services. Seriously: No startup or SAAS is really charging for their actual software. The whole reason an MVP works is that you are selling an idea, and a solution to a business problem, not some code. The actual execution of the solution is an implementation detail. That's why many people can get paying customers before they've written a line of code. Also, I think you overestimate a corporate customer's ability and willingness to clone a repo, edit and run a build script, and host their own solution. Corporations pay money to remove problems from their business. Evaluating a new open source package, ramping up on building/running/customizing it, and then maintaining it in-house all sounds like adding a pain point to your average company. In short, are you meeting a need, and solving a problem that businesses have? If so, then people will pay you money for that. After that it's just a matter of marketing.