I understand the general sentiment about having more 18 hole courses. I get it because I prefer playing 18 holes. When I play golf in the real world, I will not go out to play if it's only going to be 9 holes. It isn't worth getting my stuff ready and driving to the course for 9 holes, IMO.
There may be more ppl here who DO prefer an 18 hole match than WGT realizes. I also understand the players who prefer 9 holes here, but only if they have certain time restraints that only allow for them to play 9 holes. I don't buy any other reason for playing 9, unless you don't play golf outside of the monitor and without a mouse.
More people playing 18 hole challenge games, like skins, match play, etc. would only translate into the games being more equal among tiers. Reason being, 18 is twice as much time for a player to make up for bad play, win holes, find their swing, and the list goes on. That said, I also believe this is why most higher tiered players only play 9. For them, most of the time, it's quick credits and less time for the stuff I just mentioned. Sand-bagger's would also prefer 9 holes because it's less time for them to be found out or figured out.
I'm not complaining that there aren't enough courses here with 18, but I think there could be many reasons WGT doesn't feel the need to do all that extra work quicker. If the signs point to 9 holes as the preferred format, why would they? Me, I have played a handful of 9 hole tournament's here, and usually on accident. If I had my way, there would only be 1 or 2 9 hole tournament's in each new set of them, because 9 holes does not a tournament make. Why do you think the PGA & LPGA play 54 or 72 hole tournament's?