[1]: A semi humorous jab at Apple.
Here's an excerpt of their pricing terms:
Do I need a paid subscription to use the images on Docker Hub for commercial use? Images on Docker Hub can be used for commercial use, as long as Docker Desktop is properly licensed. Paid subscriptions are needed for commercial use of Docker Desktop at organizations with more than $10 million annual revenue OR more than 250 employees.
Though if my memory servers me right one time I bought it for a staff of the site which has.. quite dubious legal position by hosting the abandonware. Of course it was technically a breach of contract because there were multiple people who could use it, it was still one legal license more.
After almost 20 years of using it, though, I thought "You know...this guy deserves his $20" and paid for it.