Most of my revenue comes from companies that basically resell my product with some cherry on top specializations for their local markets. I have managed to develop a mechanism (also just the nature of the product) that charge per end user so it's protected against exploitation. No marketing/landing page required on my end, my clients end up making avg. 6x on top. win win.
Is it saas? How do you enable your customers to specialize your software?
We change a few variables for what color scheme and theme is applied, what support docs are linked, and what which domain names are used. Other than that, there is very little code difference between what we sell direct and what the resellers present to their clients. Some of those resellers are big names with enterprise reach that we will never have. In the end, it all works just fine for us.