Oh boy! I’m in!
Here are some things I’ve discovered so far:
With the Twitch Prime account linking, you get a “free master penthouse”. What they mean by that is you get a free penthouse with only a master bedroom, and all the other upgrades (lounge, office, garage, spa, etc.) cost extra. Makes sense.
Dear lord. Never saw this one coming. It appears that you are somehow able to exchange chips in the casino 1:1 for $GTA. No idea how they’re skirting regulations here. For things like the slots they list your odds of winning, but you wouldn’t think that would be enough.
There are two different garages at the Diamond. The first one is the “Parking Garage” which is a public garage that anyone who comes to the casino can park their cars in, and see the cars of others who have parked there as well. Obviously no combat in the Parking Garage. There is also a 10-car personal garage purchasable with the Penthouse.
Five new cars were added as part of the Casino DLC, however quite a few more are expected to be added in the “drip feed”.
Truffade Thrax - Legendary Motorsport (2,325,000 $GTA)
Enus Paragon R - Legendary Motorsport (905,000 $GTA)
Annis S80RR - Legendary Motorsport (2,575,000 $GTA)
Weeny Issi Sport - SS Superautos ($897,000 $GTA)
Vapid Caracara 4x4 - SS Superautos (875,000 $GTA)
Will continue to update this post as I play some more.