Simon spun off part of their portfolio in May, 2014 to Washington Prime Group, which is now known as WP Glimcher (NYSE:WPG).

The "Simon Mall" brand at these properties was left unchanged until recently. As of Mar 1, 2016, this portfolio will be branded as WPG.

For now, WPG has elected not to continue the Simon relationship with the Blackhawk Network, so all the gift cards that have been sold by these Simon properties (incl. VGCs) go away as of tomorrow. WPG malls will continue to sell AMEX gift cards under an agreement directly with AMEX, though as I understand it they are restricted to a max of ~$225 (not sure about this number).

Here's a list of the affected malls: http://www.wpglimcher.com/map/#propertyList