In light of NYS AG Eric Schneiderman shutting down DraftKings and FanDuel in NY because he has determined that they are in fact wagering, rather than games of skill, I thought I'd note something I've thought about for a while.
One major difference between what I do and what the sites do is that I play for a full season, while they run games that last one day for baseball, or one week for football. It seems to me that while there is skill involved, the longer stretch allows it to be exercised, while shorter spans emphasize luck. It's the difference between a 100-game tournament of Scrabble or backgammon and a single game. Luck can and will and does permit poorer players to win single games (or even short runs), but in the long term, skill will win out. (Side note: Those are the sorts of games I prefer, as opposed to games with no element of luck at all, such as chess, or games that are all luck, like many dice games.)
I think the AG has it right, and until regulations are put in place that ensure fairness and as much honesty as there ever is in gambling, I support him