Reminded me of this long but worth it piece:
http://www.theverge.com/2015/5/6/8544303/casino-slot-machine...
"I can’t tell you how often I’ve been approached since the publication of my book by Silicon Valley types who say things like, ‘Wow, the gambling industry really seems to have a handle on this attention retention problem that we’re all facing,'" Schüll told me. "'Will you come tell our designers how to do a better job?’"