I joined savemore.com and bought the plastic bottles. My son also bought one so I got the $10 referral credit. Today there was a subway gift card deal which I bought but it didn't use the credit I have. What can you use the credit for?
I can't answer your question but I wanted to give you a warning. I bought a gc to fabulousnails on savemore and I'm having a terrible time getting my product I ordered. Just becareful! Sorry off topic!
Otherwise I believe they have a forum for each deal they have. You have to be quick, it closes fast.
A few weeks ago they had a Chili's gc and in the fine print it said that you could not use the referral credit towards the gc purchase. That's probably what happened with your Subway gc purchase.
Although I am not sure if the thread is ugly, I can tell you I am one of those people that ordered the collapsable water bottles in August and still have not received anything. I used my ebay debit/credit card that is not linked to my home account not my "real" card that my dh and I use and I'm worried sooner or later they will take that information and use it but so happy I didn't use a card linked to my savings.