Get a copper membership to improve this announcement thread of your gambling site. I noticed you're not answering queries there and even here, if you want to build a good relationship and reputation then exert time and effort to interact with them. On the other side promos and bonuses can attract gamblers to play on your site, if you have a budget to run a signature campaign here it is also one of the effective way to spread awareness to notice by gamblers.
And the funny thing here is, this thread is now attracting interest from this community whereas, his thread is still silent .
Don't know if he is serious or know the business he's into. Just by reading the suggestions from the users here, he can pick up tricks how to attract interest from the gamblers here. But if he is expecting free advertisement, I don't think he can get one.