either a membership or a frequent golfers card or something that entitles em to a bucket after every 10 bought or, having different memberships, ie $350 bucks worth of range balls for say, $200, or $800 for $500...the heated, all-season range by me has 2 different 'golfer card' options and they make out like CRAZY in the winter...and we have 3 (or more) ranges within 10 miles.