What I noticed about sports pickers is that they find exploit any discrepancies in the odds being offered by bookmakers. Making them really good at what they do and a bit of luck of course. Hope someone wilk share methods of doing so.
I think that's another thing, it's called no risk betting because they are using arbitrage betting taking advantage on odds differences of different bookies. I think what OP would like to know is on how to win in sports, like your win rate should be over 52% to be profitable.
I read in some forums asking the similar question, some said that 52% is the key and with a good bankroll management, it's possible to be profitable.