Now keep in mind this is all of Microsoft support not just generic Jenny who probably boils down to a auto response bot with a delay. They do this to anyone that has multiple microsoft accounts in general(they don't even have to have points in one account they will close both), uses a vpn, uses a proxy(even within USA), and anyone they deem a possible winner in their drawings. Microsoft rewards was nothing more than a scam to generate more traffic. They don't care they want your private information and search data to attempt to sell to advertisers.
Hence why they are demanding 1,000,000 points. It is a obscure high number to "catch cheaters", be for warned.
I call bait on this one Microsoft. Now how else are we suppose to get our Microsoft store gift cards.