The cards have been restocked at least once since I created this thread for those who were wondering. I created this thread mid-march and the cards were restocked early April. So it shouldn't take too long.
Currently the $10 Amazon.com gift cards are out of stock - that's completely understandable, I'm sure they're the most popular.
I'm not trying to nag, I'm just wondering on average how long it usually takes before they're restocked - if anyone knows. Is it something that I should check back every few days, or should I not expect to see it for a few months? Or is it just random and unpredictable? Just looking for a ballpark time frame, not any specific dates or promises.