Maybe you need 20.000 plus the fees, don't know how much, lets say it's 5.000, so you need 25.000... I never used this site btw...
Try to talk with the support, for sure they will give you a better awnser.
+1 and I may think to get over 40k Satoshi for withdrawing your amount from there, At this time the effective fees at 20k Satoshi which it is mean if you be able for withdrawing your money if it was getting over 40k satoshi.
First guy never used site but he thinks there is fee, 5000 satoshi(maybe), and second guy gave him +1 on that and add additional 15K satoshi fee on his 5K fee, its good that another signature spammer didn't come with +2 and add on 20K fee another fee.
To OP: check this thread
https://bitcointalk.org/index.php?topic=1616986.0, it looks like site is paying, try to contact support or PM admin here in bct. There is no transaction fee in this faucet, withdrawal should be instant after you ask for it:
Even if you have enough bitcoin to withdraw, most faucet will limit your withdrawal once per week at a fixed time. We allow you to withdraw anytime you want. Minimum withdrawal amount to use manual withdrawal is 20,000 sat. Do not worry about the transaction fee, we cover it for you.
As an additional measurement to confirm that you are human, we need you to sign in using Google (one time only). Our apologies if this is not convenient for you, but we need to do this until we find a better alternatives to fight bot.