To be honest, i don't think it's an easy mission to achieve. You know those events require further sophistications in the system because the event will happen on the platform, and require a professional management because it's not that easy to manage such a particular if the manager himself isn't a poker fan, in addition to the budget located for every event especially if it's in a weekly basis. This is why i don't think many casinos can follow 1win in this kind of events.
The bigger problem is that poker requires constant amount of people playing at any given moment in the day. There has been a poker website in the crypto world, not going to name, but it is 10+ years old, and they had such a hard time getting to a point where they had like 20 people playing actively in any given moment.
You need to have thousands for it to be a profitable business, otherwise there is really no need. So they are showing why it would not be a wise decision to go into poker, it's a good addition if you have other stuff, but it's not profitable at all, not at this level, you need a lot of players to make it profitable and I am pretty sure it's not going to be profitable at the very first start for a few years before it starts to make any profit.
Another two big problems for casinos to integrate poker in their systems; One, is that poker game requires more complicated technical infrastructure which increase operational costs such as multiplayer table management and anti-cheating systems. Two, is some lrgal challenges because some regulatory authorities impose many restrictions on peer to peer games which make more comlicated to obtain an operating license.