With user acquisition costs of "$190 per user for DraftKings and $110 for FanDuel" [0], what, besides long term casino-style gambling addiction, can hope to recover the costs? And unlike casino gamblers, don't 'bro-classic' people tend to grow out of these things after a while?
[0] http://www.usnews.com/news/articles/2015/10/30/draftkings-fa...