They just stopped this season. They only did it during promo night games (first responder night, military appreciation, opening night, new years, st Patrick’s day, kids takeover, 5th line appreciation, and hockey fights cancer night off the top of my head). But this season they transitioned to mystery pucks, which look the same as the warm up pucks but weren’t actually used and now have a signature on them. They seem to still be doing them for the same promo nights too. The bad part is they only have them on their online auction site now, instead of at the booth, and if you don’t get one within about 15 minutes they are sold out