Greg,
There's quite a difference between "everyone's doing it" and what I said, which was " There's something going on if all your competitors are using the service".
As you just said, you use similar services, just not Golfnow or that 'model'. I'm not defending Golfnow's practice of selling the bartered round for less than the other rounds a course gives them, and I've said that earlier, I am saying that third party providers who sell discounted rounds aren't something to be feared. Most courses do it in some fashion or another, and in looking at your website I saw that you have you own, like time of day, seasonal adjustments, player cards, and a resident rate for a skins game. I didn't check out any of your competitors sites, but I'd guess they have programs like yours.
If your competitors chose Golfnow they must have felt that the exposure they get by using such a provider, one whose site is viewed by millions, is worth a few bartered rounds if it will put more focus on them than what is offered by other companies.