Just wanted to share my experience here. I tried PrivCards and had to load $150 USD to use it. Unfortunately it didn't work for me — I created 2 virtual cards and neither of them worked when I tried to use them.
I already sent an email to their support team asking for help, but it's been over 24 hours now and I still haven't gotten a response.
Is the creator/owner of PrivCards active on this forum? Would appreciate some help here, or at least an explanation of what went wrong.
On the other hand, WaldenPay worked for me without issues. The fees are a bit higher, but it actually worked when I used it, so I'd recommend it over PrivCards based on my experience so far.