After so long inactivity with no updates then you come here to inform the community that your are going to close? Is this really because you lost financial backing? Sounds strange if you say betballer was a top tier destination for sports gambler but you lost your financial backing.
I saw they posted it on their website last week so they might have been announcing it there for months. But this is why you just don't start a gambling website without secured funds of operation. This is how you are declaring bankruptcy in an elegant way.
Good thing is that you are letting your players to cashout before the closing.
If no requirements sent, they won't allow a cashout.