I don't think that shutting down the site altogether is a good idea, perhaps just disable the games for the time being but allow for people to access their balances?
That way players don't feel like you're just leaving them high and dry.
This is a good idea. I don't have any funds invested in this site currently, but I know how it feels to have your funds inaccessible in this manner. Makes you feel like you got scammed or something similar.
Am not stating that this is a scam site, but the 500xBit team needs to allow players full access to their funds without resorting to sending emails etc.