After clicking the PayPal Digital Gifts portal link provided by the original announcement post, I select the $50 option, and click Buy For Me. I'm then taken to the Paypal Login screen to confirm the purchase.
The one that looks like this:

After entering my credentials and clicking continue, I'm then taken to this error page:

I know that both my bank card and U.S. PayPal account work just fine. And because it's Thanksgiving today, PayPal's customer support phone number isn't working to try and see if they can help me get things working on their end. The second picture says the problem lies with the merchant. What gives? I've been waiting 2 weeks to buy MC because I knew you guys were gonna do something for Black Friday. I'd like my goodies please!