When we were there Dec 8-15, the rate was $50. Both DH and I golfed for $50. Rates are good for cardholder plus up to 3 guests for $50 each.
They have had three different rates ($35, $50, and $90 depending on the season). The rataes have been consistent for the last several years. The dates the rates change varies slightly year to year.
The are also advertising a special rate of around $70 or $75 to golf at the Celebration course. We haven't golfed there yet, but will probably try it next trip. I don't think you have to have the card for that.