I have gone through the given few sites and they are interesting. Come provide live streams too and their payment policies are also clear. If these ranking are based on Alexa rankings , then these rankings can be trustworthy. One site missing in the list which I have come across is spoetsbet. You can try that too.
It's e-sports and I think sportsbet is more known for football because they even have sponsored a team, Watford FC. While the sites on the list are more focusing with e-sports betting.
I can say that those few sites on the list are really popular because they are also sponsoring some famous e-sports team and made their site attached to the usernames of the players. Looks like it's one requirement for their sponsorship and so that people will know their brand and remember their casino.