I'm far from qualified to give legal advice. You'll need to speak with a lawyer who knows the laws of where you live.
From my experience, there is no qualified advice when it comes to bitcoin. Hardly any country has proper laws or percedents.
I actually worked on a unique gambling site for 6 months and ended up not being able to release it. There is simply no way to launch a bitcoin dice site that's able to compete and is legal. The problem isn't even license fees(150k+/yearfor 2 different licenses if you want to be able to legally offer your service in the whole world except the US and Australia).
It's the simple fact that you will have to collect personal data from people who sign up and when you compare that to simply putting in a name on PD there is no way that members of the bitcoin community will come play at such a site.
Also a Costa Rican company provides absolutely no protection according to the several lawyers i have talked to.(Only got this information after i had already made one l0l)
Anyways, sad to see you sell the site. Couldn't think of many people in the bitcoin (gambling) community who are so passionate and have so innovative ideas and projects.
The amount of work and thought you put into your sites made me trust you even when i hadn't seen you on bitcointalk.
This could be the last good bitcoin gambling investing opportunity gone if the wrong person buys it. I do trust that you will choose the right person though.