Doesn’t hurt to ask?
Spas that accept credit card should be ok with them.
I have had a couple though say they wouldn’t accept “non chip cards”
Plus are you talking multiple gift cards for like $50 or something?
That would be really annoying having a shop run $50 at a time and they probably won’t do it!
Another option is go buy gift cards at a store using those prepaid Visas, then send them to “Cardswap” then you can get the cash although at a reduced value.
$100 card will get you about $80 to $90 cash/paypal deposits to a bank account.
I’m not married but in a “complicated situation” where I need to stay discreet with my spending habits.