I got the same mailing. Same results, "cannot be redeemed at this time"...I contacted live support. Here's how it played out...
Please wait for a site operator to respond.
You are now chatting with 'Casino Support'
Casino Support: Welcome to casino support how may I assist you?
kissmecake: hi
kissmecake: i got a letter in the mail from the casino...
kissmecake: it gave me the code "GO21FREE"
kissmecake: but when I tried to redeem it, it says cannot be redeemed at this time & to contact you
kissmecake: so, here I am
kissmecake: what's the deal?
kissmecake: Hello? Are you still there?
Casino Support: After carefully checking your account, I can see that you did not come through the correct path in order to qualify for this bonus. Since this is the case, I’m sorry I cannot credit your account with the $21 free.
Casino Support: We try hard to ensure that such situations do not occur, and we do apologize for this error, however, you are more than welcome to take advantage of our welcome bonus in which you will receive 300% on your first deposit!
kissmecake: Wait a second...please tell me EXACTLY what path IS the correct one?
kissmecake: Hello? you still here?
kissmecake: Excuse me...I have more questions...
Casino Support: After carefully checking your account, I can see that you did not come through the correct path in order to qualify for this bonus. Since this is the case, I’m sorry I cannot credit your account with the $21 free.
Casino Support: We try hard to ensure that such situations do not occur, and we do apologize for this error, however, you are more than welcome to take advantage of our welcome bonus in which you will receive 300% on your first deposit!
kissmecake: Ok, good. You know how to copy & paste...how about some real answers?
Casino Support: That is the real answer
kissmecake: no, it wasn't. you either did not read my question, didn't understand it, or ignored it completely
Casino Support: That coupon code is for only customers signed by the proper authorized affiliates. It is sent out by affiliates in the US. Unless you have signed up with the proper affiliate the bonus will not work.
kissmecake: so who or what are the proper affiliates?
kissmecake: and if what you just said is the only way to qualify, then why was I sent this mailer?
kissmecake: SO, WHO OR WHAT ARE THE PROPER AFFILIATES?
Casino Support: i don't know
Casino Support: we don't know
Casino Support: and you can't know
kissmecake: then HOW can you know that I don't quakify?
Casino Support: it depends where did you dl the casino from
Casino Support: because
kissmecake: *qualify
Casino Support: you signed in
Casino Support: by going to a fake link
Casino Support: sent by a rouge affiliate
kissmecake: I downloaded it from a reputable casino bonus site
Casino Support: our website is
www.goldvipclub.com Casino Support: that's it
kissmecake: yeah...and your point is?
Casino Support: my point is
Casino Support: look at the letter
Casino Support: that you received
Casino Support: and please
kissmecake: and what am I looking for?
Casino Support: tell me what is the link they told you to go to
kissmecake: Possibly it was the one you posted here...however, since I am already a member, it didn't make sense for me to download it again!
kissmecake: Wouldn't that be considered fraud???
Casino Support: once again
Casino Support: we didn't send you this promotion
Casino Support: if you read the letter
kissmecake: who did?
Casino Support: you'll see that the link is NOT our website
Casino Support: it's just a rouge affiliate
Casino Support: who wants you to click on their website
Casino Support: so they can reveive money from that
kissmecake: at the risk of repeating myself, I DID NOT download from the letter!
Casino Support: we have nothing to do with that
Casino Support: they used a template of our letter
kissmecake: I downloaded from LATESTCASINOBONUSES
Casino Support: ONCE AGAIN
Casino Support: is that our website?

Casino Support: no
Casino Support: OUR WEBSITE IS W
WW.GOLDVIPCLUB.COM Casino Support: not gold21free.com
Casino Support: or latestcasino
kissmecake: I will be sure to tell them you said so
Casino Support: or casinofree whatever
Casino Support: thank you
kissmecake: Glad to help
Casino Support: now if you want you can receive other promotion
kissmecake: Now..supposing I decide to download directly from your website?
Casino Support: i'll be happy to offer you a 400% on your first deposit
Casino Support: it's too late
Casino Support: when you dl the casino from a fake link
Casino Support: you signed up with a certain affiliate
Casino Support: who is not the correct one in order to redeem th bonus
Casino Support: now i can offer you a 400%
Casino Support: the code is SLOT400
kissmecake: but if I download from YOUR website, then what?
Casino Support: once again
Casino Support: you are ALREADY
Casino Support: associated
Casino Support: with an affiliate
kissmecake: Not for long
Casino Support: there is nothing you can do about it
Casino Support: we have your account
kissmecake: You have educated me, thank you very much for that
Casino Support: associated with it
Casino Support: my pleasure
Casino Support: i wish you
best of luck dear
kissmecake: You know what? I really don't care. Once I dump the casino, I won't be loading it again
kissmecake: You, have yourself a FABULOUS day!