A bit surprised to find they are charging to use my code I thought only their DVR was included in Premier.
I think you have the wrong understanding of what's being charged for.
Live TV/DVR functionality of the Emby core is now part of Premiere. Premiere of course pays the bills to keep the devs working and churning out new code, pays for the EPG data that is also now available and is high quality, pays for the use 25 premiere clients and all the development work needed for TV/DVR on the client side as well as the server, pays for the transcoding and HW transcoding dev work to make this all runs smoother, etc
It has little to do with any DVR plugins that just augment the functionality already in Emby.