Sell your expertise as an integration/support engineer to companies who want to use your project but don't want to dedicate the internal staff time to become experts on same.
Every company that emails you asking you for help is a sales lead. "I'm happy to implement/configure this for you. I charge $X per hour, and what you're asking for is about Y hours of labor." To the client, X*Y is often cheaper than the opportunity cost of pulling an engineer away from other work. Also, don't be afraid to make X >> $100 if nobody else offers the same expertise.
You can do as much of this as you want, without changing anything about how the software is licensed or packaged.
Every company that emails you asking you for help is a sales lead. "I'm happy to implement/configure this for you. I charge $X per hour, and what you're asking for is about Y hours of labor." To the client, X*Y is often cheaper than the opportunity cost of pulling an engineer away from other work. Also, don't be afraid to make X >> $100 if nobody else offers the same expertise.
You can do as much of this as you want, without changing anything about how the software is licensed or packaged.