Don't proceed.
You already have the keywords not to pursue or withdraw your said balance. They doesn't have any plans to pay or approve the withdrawal requests of their user. When a website asks you to deposit first before accepting your withdrawal request, don't proceed.
I have seen a scam accusation about them recently but I can't find it anymore.
There are so many newbie member create a thread for this site, but I think most of them are deleted already because it is clear scam attempt. Offering good amount of money just for registration but asking to make deposit in order to withdraw the winning is a definitely scam. Surprisingly most people who claims the bonus then use it to play the game get big win. So it is another proof that the game is being manipulated to make users win much so they will be fooled to deposit smaller amount to withdraw bigger amount.
Those newbies who create such threads regarding the scam are shilling their project and doesn't have any plans of replying to their threads. As long as they have been posted what they have to do and give exposure to their website, that's what matters to them.
I felt sorry for those people that are buying to their terms of "deposit first before withdrawal" because they literally been scammed. Whomever is interested there, please read the conversation here first and don't ever buy on this scam.