there are reports that Staples has recently hardcoded GC to GC conversion. The last time I was able to pay with StGCs was Monday, this week. I paid for a VGC combined with a small item and swiped a $25 StapGC first and the rest with Ink+. I have no more StGCs to use this Sunday so I can't find out if it's hardcoded at my go-to store.