after that experience, i started using bitrefill for amazon.com gift cards. they are unfortunately the most expensive option by far. they charge an extra 2% on everything. they do have the added bonus of processing with zero confirmations (make sure not to use RBF though!) if you pay with 6+ sat/byte fee rate, so i always use them when i'm in a hurry. however, i'm getting sick of being overcharged every time so i might go back to the bitpay wallet.
I've noticed this too after using them. As far as I know they are the one and only gift card provider that sticks a premium on top though I guess almost all others use Bitpay's exchange rate. It kind of negates the point. If you have a decent exchange you may as well use that as it'll almost certainly be cheaper than 2%.
For another 0.5% I can use a Coinbase debit card which leaves me with money to spend elsewhere should I wish it. I'd choose that instead.