Oh yes, so I once worked on online poker games, and as part of the training material we all learned about variable schedules [2] and operant conditioning [1].

It's hard for me to use Facebook or play Candy Crush after being exposed to that material. On the other hand, the real heroin, loot-dropping Action RPGs, for some reason I can stand to play those in short spurts before losing interest. I'm not sure why, perhaps there's something wrong with their scheduling...

[1]https://en.wikipedia.org/wiki/Operant_conditioning_chamber

[2]http://rationalwiki.org/wiki/Variable_ratio