I'm just reminded of another contest I won, this time at a science fiction convention in Calgary, about 30-odd years ago.
It was one of the Thanksgiving weekend conventions, and we were at the Palliser Hotel. For some reason the dealers' room was stuck away in an absurdly small room that wasn't all that close to the rest of the convention. The dealers weren't happy about not getting as many people stopping by to browse and buy, so some of us made a point to buy something - this was before you could buy everything online, so these folks were my source of various SF/F goodies I couldn't get locally.
Anyway, an educational toy store was one of the vendors. Why they thought they'd do well at a small local SF convention is beyond me. But they had a promotion going. Every purchase would get you a raffle ticket for a prize of some kind. I wasn't really thinking about what the prize might be when I bought an astronomy-related item from them, but I got my ticket, they got my name, and I thought no more about it.
But on Sunday, I made one last trip to the dealers' room before we headed home, and the people at that table were quite relieved to see me. They'd held the draw, and realized that all they had was my name - no contact information (they could have gotten it from the concom, but whatever...).
I'd won a board game - a very nice one, of good quality manufacture, that was about the California gold rush. The object of the game was to mine as much gold as possible, while dealing with bandits who wanted to steal the gold. The gold had to be gathered before the train got into town (determined by the roll of a die).
Some friends and I played it on New Years' Eve, and it was a hoot - my boyfriend insisted on rolling the die each turn to see if the train was advancing (he liked making train sounds), and one person decided to hell with acquiring the gold - she appointed herself the town sheriff and focused on capturing the bandits "because I have 5 unmarried daughters and they have to find husbands somewhere!"
I don't remember who won. I just remember getting high on nothing but laughter (the egg nog was NOT spiked!). I still have that game, though I haven't played it in ages.