We don't know how big these gambling cases were though. The FBI is known to exaggerate the size of gambling operations. A few years ago the Philly mob had a gambling operation at the Borgata that was busted, the FBI claimed it was a billion dollar operation! It probably wasn't one-tenth that.
You're talking about some gambling busts up in New York. The highest estimate for the Philly/Borgata gambling bust was about $60 million taken in bets over a 20 month period.
Even if they claimed it was a 60 million dollar gambling ring, they are still exaggerating badly. The bust in New York could be of a bookie with 10 customers betting for all we know. There is no doubt in my mind the way NYC has changed over the last 20 years has hurt the mafia. There are not as many people to take bets, not as many potential extortion targets. The NYPD shut down all the peep shows and porn shops that were lucrative for the mafia. The mafia no longer has a large pool of potential members to recruit from, and these recruits were much less likely to grow up around it like guys in the past.
