It would be good to provide a signed message in your cold wallet once the investor provides you with the funds for your site, it is one way to ensure you have sufficient bankroll to process withdrawals if a whale wagers huge amount of money and win while playing on your site.
Yes i will provide thatLike I said before, there is no site that want to sign message just to prove they have enough bankroll to cover all the withdrawals. I know that you need the proof so people will stay calm that their withdrawal will be process but it does not mean site need to give you that because it is the privacy for them. May be if they send it to other address and sign it from there might be possible but to sign from the main address I do not think it will work that way
There is a difference case here, Zoomdice said that they will sign a message months ago. This is why some people re-asking about it, the reason behind the sign a message of this site was because they took so long time for small withdrawal. The issue made people worry to play, that's why they ask for proof of solvency by signing a message and Zoomdice agreed with it.
If ZoomDice agreed to provide a signed message they should comply from what the members are asking for. The signed message is their way to give assurance and it won't stop until the provide one. And why is it until now they haven't complied to what they have agreed on? And basing it on their previous replies they are moving the date on when they will provide a signed message.