You cannot use an unlocked 0.7d client on official or public online servers. The LFS master server verifies license keys for any server listing or "Join" request. If you try to join an S3 server with a patched executable, you will receive an error. The only servers you could potentially join are other pirated servers using a custom patches—which are almost nonexistent today.
As LFS added support for vehicle mods, the community exploded with custom content. Users demanded better ways to play these mods without the standard restrictions, making the 0.7d unlocker a high-demand item on forums. Lfs 0.7d Unlocker
LFS is developed by a very small team. Unlockers directly divert potential revenue needed for the continued simulation of physics and engine updates. You cannot use an unlocked 0
Many online servers use "Insim" mods (scripts that run on the server). Some servers override demo restrictions temporarily while you are connected. For example, the or "Drift" servers often allow demo players to use locked cars on locked tracks for the duration of their session. You cannot save replays, but it is a legal way to taste the full game. The only servers you could potentially join are