Ah yeah, I know, but I think some countries buy a 100 at least... the 88-100 is for the US probably...
But hey, I might be wrong, I don't know. At any rate, networks are assholes... if they're losing money, they don't greenlight shit. So either it's for syndication purposes, or it's because they know the DVDs will sell enough to justify the expenses.
Also, logically, it's always better to sell a finished product... =P
Edit: I sort of remember as well, although again, I might be off-base because this is stuff I read ages ago... That the reason final half-seasons are 13 episodes, instead of... say 5 to reach the minimum for syndication, is because of the rules imposed by guilds, associations, or unions or something like that... I think they have to contractually greenlight a minimum of 13 or so episodes (if a pilot is picked up). Which is also why series that tank usually get only 13 initial episodes... Probably got to do something with getting the minimum required to get the whole production machine up and running... or something =P