In my opinion, the best marketing they can do now would be to offer bonuses, giveaways on this forum and run a long-term signature campaign while paying more casino review sites and streamers to promote the casino and its bonuses. This way, the casino would have a large flow of new customers. But they would need to abandon the token. Because in my opinion, this token does not have a good future and will be a problem for the casino. People who will be losing money with the token will be blaming the casino and as a consequence will stop using the casino. There is a big difference between losing money on the casino token and losing money playing at the casino. When people lose money playing at the casino, they will think it's normal. But when people lose money at the token, they won't think it's normal. They will get angry and go to another casino.
Only way for them to "abandon" the token and not getting sued for it, would be that they would just burn rest of their tokens and slowly buy rest of them from the market and burning them. But that might make it more popular and they have been pretty much flying under a radar and they might not want attention to some of their practises.
Because if enough people end up getting screwed by this, betfury will pay a price. They can't get sued just for bad price, but they have done huge mistakes on their advertising and team members implying and directly promising price growth in the past. And since they obviously are serving citizens from restricted countries, they could get in real trouble if they exist in a country that has extradition agreement. But at the moment, there's not enough money on the line.