So who and what counts as an unauthorized seller?
This thread has me a little concerned - not because I think Bitrefill will scam me (I've used them probably 100+ times for at least a dozen differnet retailers without a single issue) - but because I am worried that Amazon will arbitrarily lock my account with no recourse available simply for using legitimate gift cards.
I'd be surprised if they weren't authorised. There was a large purge of Amazon resellers a while back and plenty either didn't return or took a long time to list them again.
My main place for Amazon cards is Giftoff.com and the availability there appears and disappears with great regularity. I presume they have to plead to get them back or fulfil some new condition.