I'm not sure how to explain all this without writing a 70 page dissertation on HN, and it's probably not worth it :)
Overall - this is a wildly complicated area. To give you an idea how complicated: Ignoring state law, transmitting gambling information for sports events over the wire is a federal crime. See 18 U.S.C. § 1084(a), which makes it a crime for a person “engaged in the business of betting or wagering” knowingly to use an interstate or foreign wire facility to transmit bets/wagers or information assisting bets/wagers “on any sporting event or contest.”
(It's legal if you are transmitting from a jurisdiction where it's legal to a jurisdiction where it's legal).
This has been upheld repeatedly for sporting events.
New york can, and did, include a claim to enjoing them from violating this act, which has absolutely no pre-emption issue because it's not a state law.
The case you cited is going to end up in the supreme court, where it will be a toss up. (in previous supreme courts, it would be a non-starter and the third circuit would have been summarily reversed)