LFS has a set number of unlocks (In my opinion to stop account sharing to an extent with this) I don't believe there are any work arounds so.... Enjoy the wait~!
But in your account you can see how many unlocks you have left for the week.
Wrong - if you have a valid reason,you can contact devs and ask for extra unlocks by explaining how you wasted them.
Also wrong - initially you have 3 unlocks. If you have used some and have less then 2,you will get an aditional one unlock every friday until you have 2 in total again. In case of new official patch,everyone gets their unlock count reset to initial 3.
But yes - the general idea is to limit account sharing,allthough only one computer with same licence can be online at same time anyway.