I was thinking along the lines of a subscription. I'd like to release a music software package as either BSD or GPL. As I'm preparing an installation procedure it just seems to make sense to do this in a dockerfile and sell the docker image so people can simply execute it locally with almost no knowledge of a cli. If the subscription runs out you can still keep using the docker container but if you erase it, its a bitch to get it back. Which could be good for me because they'd come back to find it even better than before and I could have $5 in my hand, enough to buy a movie ticket. So.. Before Docker goes out of business it would be cool if they would allow people to sell subscriptions to docker images, not just to the whole service.
Is it worth $5? I think so because my software allows you to arrange for chamber orchestra and at the same time, hear the results played by a chamber orchestra about a minute later.