Thank you for your valuable feedbacks and sharing your thought. I totally agree with your approach for a general Saas project/product and frankly speaking, I prefer as well your business model because it can bring recurring revenue instead of one-time sales.

Here in terms of Nextless.js, as the customer will have access to the source code, the revenue sharing like 3% as you suggest is extremely hard to implement. It raises a lot of technical challenge...

Perhaps in the future, this concern can be addressed somehow and your proposed business model shall be implemented. Have you had such concerns/experiences for your projects? Pricing is not an easy subject though :)