In my experience it's not sketchy at all, the companies pay you out within 24 hours with no issues whatsoever. The "insider info" stuff is sketchy, but that is why you should play the large guaranteed prize pools, where there are so many users that any "advantage" won't be as damaging or large overall. Stay away from head to head matchups etc as that is where it can bite you in the ass (if certain users have data on who you pick etc) I don't think it will go away for good ala Poker Stars, too many leagues, teams, and big companies are either investors (NBC, Time Warner, Comcast, KKR) or have valuable partnerships (Disney, MLB, NFL, NBA etc) It just needs some regulation IMO. As far as your friends who haven't had luck, nothing is fool proof, if it was we all would never lose, however with the slight amount of research and learn/follow some strategy's you give yourself an advantage over a good chunk of users who simply just throw darts at a board more or less, in that case you should be able to at least break even long term and should end up "up" overall. You won't get rich off it, but you won't lose your ass if you play smart (much like Poker strategy long term)