Assuming it's the same thing (people raffle stuff like homemade desserts, backyard chicken eggs, etc.), someone gave me a blow-by-blow of this the other day and it's so hilariously typical of both the way there are a ton of beer geeks who are degenerate gamblers while simultaneously not understanding neither basic probability/statistics nor basic economics. The description I got was something to this effect:
-beer geeks started getting added to this group (maybe others?) and immediately grabbing up all the spots in raffles
-non-beer geek group regulars started complaining about how everything was filling up too fast
-prices started rising rapidly
-beer geeks, not understanding supply/demand in the slightest, started complaining about how things were costing twice as much as the week before
You could honestly probably put together a pretty good module in a behavioral economics class using the craft beer scene (both online and off) as a case study.