Good Sam Discount at RV Parks

With the rise in gas prices and more RV Parks charging more to cover their costs, why has Good Sam not raised it discount to parks? I think 25% would be ideal but at least up to 20%. As things go up so should the discount! I have a lifetime membership to Passport America but sometimes need to stay outside the regulated times and would like to take advantage of my Good Sam discount but at 10% not really worth it. That is only 4.50 off of 45.00 and doesn't usually pay the tax! Also we have been members since 2006 not 2013.