Microsoft Cashback fails to deliver payments

I recent checked my MSN Live Cashback account to check if I receive my $49.95 I was supposed to receive from a ebay transaction. But no payment was found except for this

We've encounterd a problem depositing your cashback reward into the PayPal account that you used for your eBay purchase. But we will keep trying.

Dozens of slickdeal users have the same problem.