Because they are selective scammers. They didn't harm every user, but only a few percent, so they still have a solid base of satisfied customers. Plus if you remember their signature campaign, there was a large number of those who wanted to participate, regardless of whether they knew it was a scam casino. Imagine how many promoters, and influencers are not interested in their reputation if they pay well for promotion.
For example, I know about a satirical account on Twitter, Trollfootball, they have really funny tweets and a large follower base, but I also saw 1xbet sponsorship on their line.
But still it's really weird and vexing to me that they're still able to operated despite that but then again with selectively scamming people, you can easily just dismiss them as people that are trying to mudsling and destroy your reputation but it didn't work for 1xbit because they got to greedy and they've gone over to how much people they're going to scam, it's for the better that they did though because now, everyone knows their name and it's quickly associated with scammers and scams perpetrated to gamblers that just want to have fun. 1xbit and 1xbet I think is a separate entity because I do believe that there's times that I've seen 1xbet being promoted by some streamers and there's not a lot of issues with them so either it's a separate gambling organization or 1xbit is just scamming people on their crypto side.