You get three when you purchase S2, use 1 to unlock it initially, so you have two left, which is also the maximum of unlocks to have.
If you use them, you get one unlock back every week.
The question remains though, why you'd need so many unlocks?
Here's an idea. How about you do some work at work, eh? Hence the name
Because 10 unlocks per week would make it really easy to share a license among friends. There's not much point changing the rules for one person who should be doing something more productive. A USB stick would be the best solution, and it wouldn't even need to be a big one.
Can you not place LFS inside a passworded folder on your work PC, or make a new user account (passworded) just for when you want to "bunk off" and play LFS then you could leave LFS unlocked, just in a safe place
Does LFS lock if you just blank out the password? If not, I'm pretty sure nobody would be able to use your LFS online (although they would have S2 content offline, I'm sure that's not really your concern).
Copy files f1.xyz, f2.xyz and f3.xyz from directory data\misc to USB key or RAR archive with password. When you want to play LFS, copy them to misc folder. When you are done, delete them.
how is that any different than copying the files into the directory then? the only way that would work would be if the machines were identical to start with...
First time:
1. you unlock LFS ONCE at work PC
2. you copy all this bs to USB key
3. you play LFS
4. you press clean button
5. ???
-1. no profit for you.
All next times:
1. you copy all bs from USB key to work PC
2. you play LFS
3. you press Clean
4. ???
5. !!!
The keys should return to 2 per month in my opinion (without any usage data). As Victor has that data, I assume he's decided the 2 per week is enough to keep 99.9% of people playing.