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.
There are some casino representative does not familiar on how the forum works or how people here approach to the new casino launch that's why he really need this recommendation coming from community members so that they improve and create something new or cool to see. But since there are so many successful casino here already then they should learn from them because leaving their thread without doing anything might give them a result that they don't want. They can also hire experience people to help them improve their service especially on marketing that they should do to make their casino a successful one that can also possibly compete with those casino who already earn a lot of success here.