Can you explain the procedure of this Enterprise to Community downgrade. It seems more confusing then ever now.

Let's say for example a hobbyist runs the community version and creates over 5 accounts (Firewall mode). I assume the software notices this and downgrades them to disable junk filtering.

If the user then deletes the 6th user and the count drops to 5 again, what happens?

Does;

a) the junk filtering re-activates itself after a few days of returning the user count to 5 or below

b) nothing happens and the hobbyist is left with no junk mail filtering permanently

c) some other user interaction required for e.g. (restart, new install, etc.)

Thanks, James.