Yes, it's called "becoming proprietary software" because what are you going to do to get that oh so reasonable compensation? Create your own billing department and manage tax payments on your revenue? Hire a legal team to create and enforce your license? Sic the BSA (apparently they still exist after all these years!) to threaten to audit organizations who aren't paying? Fend off lawsuits from users, competitors, and patent trolls? (Once you start collecting money, other people inevitably want a piece of it.)