Why the war when every gambling platform is expected to stand alone, wat could have cause a war, government are the one issuing their operational license and thy are being regulated individually each, there is no casino or gambling platform being dependent of each other except if owned by the same developer, there is nothing of such and i don't think they will ever be, people establish a gambling platform for their own personal benefits and not what they stand to gain through others influence on them.
The internet is just a small world where a user eventually be disappointed to one casino and will look for another but this user may not be going to a casino with bad reputation. If the user find out there is one casino like 1xbet that is totally a suspicious casino, he will avoid this casino at all cost.
But there may also be some casinos to avoid especially the ones with recent scam accusations. It doesn't even have to be true that this casino had scammed users. They just need to spread the word is a scam but just a false accusation.