Oh Boy I think I found (GOLD) and located what the issue is - for those with long term Tenure's please review your transaction history for your Xbox Live account at http://commerce.microsoft.com I bet it's the SAME Thing!!
I found where MS may have messed up and it's more then likely the source for which we see the bad calculations on some of these long term tenure account and why most if not all of us are seeing EXACTLY 3 years knocked off of 10 year and 9 year accounts - In fact for any account that started prior to 2005.
Here's how my history goes and NOTICE in November of 2005 I payed for GOLD on my anniversary date 11/18/2005 but for some reason (And somehow I believe this maybe when MS was offering some kind of promotion to get 20% off XBOX LIVE GOLD from there after) it only went to 11/23/2005 but you can see on 11/23/2005 it picked up again expiring 11/18/2006. Not ONCE did it transition from Gold to Silver back to Gold - this was something with MS Billing changing things around and me taking their offer to get a percentage off but still keeping a GOLD account.
Now If my 1st grade math serves me correctly 2005-2012 is 7 years and the calculation for tenure is is *** up because the way MS changed billing on the account.
MS PLEASE GO CHECK MY BILLING HISTORY and now after pointing this out PLEASE FIX MY TENURE and EVERYONE ELSES TENURE for Service that Matches this. I can guarantee this is the source of your issue - to coincidental for long tenure accounts to be losing exactly 3 years.
It's not us going SILVER it's your system not calculating right.
You can thank me later for my technical debugging skills ;)
MY HISTORY as I see it on commerce.microsoft.com for my Long Tenure account CyberMaxX
Gold 20% off 12 Months (current) Expiration Date: 11/18/2013 Purchase Date: 11/18/2012
Gold 20% off 12 Months Expiration Date: 11/18/2012 Purchase Date: 11/18/2011
Gold 20% off 12 Months Expiration Date: 11/18/2011 Purchase Date: 11/18/2010
Gold 20% off 12 Months Expiration Date: 11/18/2010 Purchase Date: 11/18/2009
Gold 20% off 12 Months Expiration Date: 11/18/2009 Purchase Date: 11/18/2008
Gold 20% off 12 Months Expiration Date: 11/18/2008 Purchase Date: 11/18/2007
Gold 20% off 12 Months Expiration Date: 11/18/2007 Purchase Date: 11/18/2006
Gold 20% off 12 Months Expiration Date: 11/18/2006 Purchase Date: 11/23/2005
Your current Xbox Live® subscription will be modified to an Xbox Live Gold Membership. Any and all remaining time on your Xbox Live subscription will be transferred to your Gold Membership. You will have continued access to demos, trailers, downloads, tournaments, friends, and your gamertag, your unique digital identity. AT THE END OF YOUR CURRENT MEMBERSHIP TERM, YOUR MEMBERSHIP WILL AUTOMATICALLY RENEW TO AN ANNUAL MEMBERSHIP AT THE CURRENT ANNUAL PRICE, unless you change your renewal or cancel before your membership ends. Pricing details can be viewed in the Account Management area of your gamer profile. For information about changing or canceling your membership and your membership refund policy, go to www.xbox.com/live/accounts.
Gold 20% off 12 Months Expiration Date: 11/23/2005 Purchase Date: 11/18/2005
We’re glad that you’ve chosen to challenge your friends in the ultimate high-speed gaming arena, with access to downloads, tournaments, and exclusive features like your unique gamertag and friends list across every game. Your subscription to Xbox Live covers 12 months of Xbox Live service. For this subscription you will be charged $49.99 per year, plus applicable taxes. Unless you cancel your subscription before it ends, you will automatically renew to the currently selected renewal subscription type at the then current price, which is viewable in the Account Management section of the Xbox Dashboard. For information about cancelling your subscription and the refund policy for your subscription, please see www.xbox.com/live/accounts.
Gold 20% off 12 Months Expiration Date: 11/18/2005 Purchase Date: 11/18/2004
Gold 20% off 12 Months Expiration Date: 11/18/2004 Purchase Date: 11/18/2003
Gold 20% off 12 Months Expiration Date: 11/18/2003 Purchase Date: 11/18/2002