There are two kind of players: 1) long-term winner ones (regs and pros) 2) long-term losers.
For 1) the main reason is traffic and how much they can make out of it. I’ve been a reg for quite a few years already and for me it is better to play micro limits in shitty pokerstar.es (where only players from Spain can play) than playing in crypto sites. Not to speak about professional players playing High Stakes at pokestars.com. There is nothing remotely similar to that in crypto sites.
For 2) it comes down to traffic and variety of games they can play.
A few things why I think there are not much good online poker gambling sites,
1. Because it is just a niche kind of gambling game. There is not much players looking to play poker to gamble. Since in poker you need to be more than lucky in it, you also need skill. There is a smaller chance to win in poker than in just playing games like dice, if you do not have enough skill.
2. Ultimately related to number 1, is that gambling sites and operators do not profit so much from it since there are not much players and there is really no house edge.
3. Takes so much time to finish a tournament, or even just a single game. This is a factor to consider for both players and the operators. Since most players do not really like to wait too much and the operators do not like to have a long game since it would cost a lot more to run their poker site eating their profits.
I don't thinks , maybe your points are right but IMO I don't think so
...
2-
operators profit way more when it comes to poker as I stated , there is house edge and that's the rake
gambling sites easily make 5-10% of the buy in for tournaments , and they make money from cash games too without taking bankroll risks
in gambling when a player wins 100K he is winning it directly from the casino bankroll , while in poker this profit comes directly from other players there are many players who are willing to join a good bitcoin poker site , as long as the owrners are trusted , the software is good
we haven't had a single site like that so far , so can't know for sure
...
at worst case the site can create a game like spin & go in stars , where games last like 5 mins on avg and people can choose the games that suit them
You are mistaken here. The main difference here is that, in poker, around 5% of long term players take money out of the system whereas in casino games no long term player takes money out. This is why all big poker sites have cut rakeback, have implemented more casino-like poker games like spins and have taken other measures that basically cut down profits for regs and pros. They don’t want people earning regular income from their sites. They want all the money for them.
The so-called “eco-system” in poker is a bit difficult to understand but that is the way it works.