Dan said that before, the question now is, if the egift cards work for the Amex promotion or not?
These kind of offers will most likely not work on GC's (unless you meant that you'll buy with your discounted GC's, products at 15% off)
exactly! You get $170 worth of GC for $100 and then use 15% off bringing it to 50% savings on $200
& to maximize it, Buy it via a Shopping portal! I always do so, (except from Amazon where I try to use Moreinu Dan's link)
Check here for the best current rates https://www.cashbackmonitor.com/cashback-store/the-container-store/
most likely not, your credit card will be charged by CashStar & not at TCS
How about Paypal?