If LFS went on the market beside massive hitters like Forza and NFS it would be a spectacular fail. The money that the guys would spend on distribution and manufacture of the CDs (the installer wouldn't need a DVD would it?) wouldn't be recouped by sales because there's no massive marketing company behind it. Really the only marketing LFS has is word of mouth and SEO.
On top of that, it's still in development. I'm not talking "it needs a patch to balance stuff", I'm talking "it's due a graphical overhaul, they're still adding cars and tracks, it still has an alpha tag".
And then we get on to the big argument - would a more busy community mean better racing? And nobody can answer that. I like to hope that an increase in population wouldn't ruin the quality of most servers, but there are some total asshats out there and as you increase the percentages you increase the likelihood of meeting them.
Let's wait until the program is finished before trying to sell it