With the exception of a few special areas (like Pick-3), the only
decent pools are Quiniela and Trifecta, and you're looking at
a takeout of 25% or so. That's the hurdle you've got to get over
to break even. So, no one can be a big winner over the long haul.
Anyone who says he is, is lying.
But, I contend you can get a small edge if you're really good.
You need top-notch player ratings and a total understanding of
the probabilities brought about by the rotation. You must be prepared
to make many straight bets per game - i.e., none of that
"box the 3 best teams" crap, and be able to last out
the dry spells. That, plus patience, discipline and good money
management can create a 5+% long term return.