Amex is on a Bluebird Hunt - Massive Wave of Bluebird Shutdowns

Amex's Bluebird card has been a useful instrument for manufactured spending for a few years.  It allowed fee-free loading of up to $5,000 per month and could be loaded via various pre-paid debit cards.  The money could then be easily withdrawn to your checking account.  Personally, I mainly used it to generate Delta Miles via Suntrust.  It appears that it's usefulness is at an end.  This morning, Amex sent out a wave of Bluebird shut-down notices like this one:

The shutdown wave is being discussed over at Flyertalk, and seems to be pretty thorough.  Both Mrs. Pointsninja and I were shut down.  This will no-doubt come as a blow to many folks who had been using the card to do a limited amount of low-cost MSing, but it's not surprising.  Using the Bluebird as nothing more than a means of shifting money around was a money-loser for Amex, and if something can't go on forever... it won't.