I'm again saying Husker is correct... my D-50 install now shows as expired! The TR-808, installed at the same time, still works. I imagine that'll expire too.
I installed the Jupiter 8, System 8, and SH-2, which all appear as unlocked for me. They all have presets. It's a little confusing though because if you click to open presets you see a blank window (or maybe is just says preset 1). But there are '>' characters on the right hand side. Clicking there is where all the presets really are. So yes, I've gotten presets with all my installs.
Bottom line - the only things free with the free account are Zenology Lite and Zenbeats Free. Anything else that shows as unlocked, that you didn't pay for, is a demo. I don't see that documented anywhere.
And now to uninstall all those demos!