The MSIGA was drafted with poker in mind. Therefore, the real meat of the text is devoted to matters related to online poker. There are a few references to casino gaming and how the members will treat cross-border internet casino games should they be implemented, but right now, casino games aren't being shared in the same way that poker player pools are.
This makes sense because in most cases, slots and other casino games do not require a large pool of participants; these games can run with just a single player. There may be an exception for the rapidly growing category of Live Dealer games, but thus far, nothing solid has materialized for combining state traffic in this way.