I totally disagree with your post.
They’re plenty of websites that track movements money on all legal gambling sites simultaneously, so it’s almost impossible to conceal mass movements of money at legal gambling sites.
Compared to when gambling was done thru illegal methods, when someone with information could spread bets around and no one would know because the fact they were taking bets was illegal.
For example, when the NBA referee Tim Donaghy was caught gambling on games it was harder to uncover because he was gambling with illegal sites.
Besides, legal sites handle many millions more than illegal sites today which makes it even harder to move the line versus before when multiple small sites that are illegal could move their lines on smaller bets.
I agree that moving the line is harder.
Today’s professional gamblers have to settle for rigging the event and then anonymously cashing in....
But—that is a lot easier than the old days when the mob had to have individual people place large bets.