Follow the forum. From time to time some races are organized to give licenses to the winners. You just have to join the race and win. If I'm not wrong, I think there is a current championship organized by the GD team that gives a license to the winner of each race. Search the forum. WIN S3 LICENSES ON A SERVER [GD] Formula BMW https://www.lfs.net/forum/thread/95331
It's already quite a lot cheaper in Turkey compared to the rest of the world. LFS licences are already rather inexpensive, and Turkey already gets it for 50% the cost.