eBay

No problem. I don't recall there being an upper limit in the T&C, but can say for a fact that vouchers were allowed. My transaction was <$300 with one item and an eBay promo code, if that helps at all.

If that's the case, try "C50MORE" as your voucher code (I've already redeemed mine). If your account has it 'unlocked,' then it might work.

For what it's worth, mine just randomly showed up in the Vouchers section yesterday. No communication, etc.

Just checked and mine has arrived. Any luck with yours?

Really? That's good to know; I thought I'd run into a glitch or something.