I like the fact that you admitted to your mistake here while announcing your casino. I will suggest you looking into other casinos announcement thread and see for yourself how they did theirs. I know you would learn from it too because it would guide you through to having a good and perfect announcement thread for your casino. As the representative of the casino here, in it is your personal responsibility and duties to making sure that the casino is well represented and presented here following good forum standard because first impression matters here in this community.
Obviously he needs that. To admit his mistake because if not, it's going to be an instant turn-off. People will think that they are not accommodating and they will now avoid this casino instantly. Maybe it's true that first impression matters. They did an early mistake there but given that they admit it, then there is still a chance that people here will gave them another chance to correct it and they will also try to sign up and play to the casino.
Getting an inspiration from the other casino is great but they should only ensure that the originality is still there. This is another way to get the people impressed and makes them stands out from the common ones.