The approbiate forum for your message should be https://coderanch.com/f/157/Cloud-Virtualization
To your question: I think the new subscription model should not change to much for personal, learning and similar usages of Docker. There are now limits on maximum usage and this hits at least big businesses in case they used Docker without any subscription.
Without looking too detailed on this change it seams somehow fair that mass usage or professional usage is limited. Hosting docker images costs money for work force, energy and other things.