I guess this is a big deal, but I confess to not caring very much because I don't support these crypto casino businesses. For me, any service provider that deals with crypto and bitcoin is not to be trusted with your bitcoin. These businesses optimize for the least common denominator. So when they serve hundreds of scam altcoins, the technical level of security and safety is lower than a business that is focused on bitcoin only.
That said, most folks' first touch to bitcoin is through a large shitcoin casino like Kraken. And this is good press and notoriety for them. Others to follow? Hopefully a bitcoin-only service provider can get there one day soon as well.