The obvious answer is to offer (or require) a maintenance plan. Charge XX% per year for a given level of support, updates, and maybe a newsletter. Here's a li

The obvious answer is to offer (or require) a maintenance plan. Charge XX% per year for a given level of support, updates, and maybe a newsletter. Here's a list of some common revenue models: https://taprun.com/revenue/ https://taprun.com/revenue/