Well, I've been looking at the Note 3 for a while (have the Galaxy Nexus now), but even at $199.99 thought I'd sit tight. Then saw this - I called the Comcast number on the link, and after perhaps 30-40 minutes on hold, finally get somebody on the line. He confirmed that you do not have to be a comcast or xfinity customer to get the $200 VISA card. Through our conversation, I had him verify this 3 separate times.
I went ahead and placed the order with him. He then connected me to the automated phone service for me to accept the new 2-year contract and terms. Received by email the receipt for the order. Put it on my Verizon bill.
He said once it is processed tomorrow I should receive an email from Comcast by the end of the day, confirming the order and the $200 VISA card. Hopefully this will proceed without complication, but I did get his name and ID badge number, just in case.