Evolution gaming is listed in almost the casino. They literally cover most of the crypto casino industry since they are the most popular provider on live games. Their profit makes sense if you will think about how wide their rich and how popular they are right now on live games.
That's true and it's likely that they will continue to dominate the live gambling market for so many coming years. Casinos love to add their games on their sites and players also love to spend time on those live games. I don't think that they have any good competitors at this moment and that's why they are having a lot of profits each month.
There is a competitor in market named as SuperSpade Games but they aren't as famous and as adopted by the casinos as Evolution gaming. However, I'm quite sure that in future they may have strong competitors which may reduce their revenue but till then they will earn like kings and no-one will be able to stop them as most casinos are happy with their games.