I get hit hard by anti-fraud systems.
If I budget 1-2h for any given online purchase, I have <50% success rate with Paypal and ~75% with Stripe. If I contact the bank and merchant, the issue is always with the payment processor. Trying to resolve through the payment processor goes nowhere. The only thing that can work is try again with another of my 6 legit cards (mix of visa/Mac debit/credit) and if I’m lucky it goes through. Sometimes the next day; I guess some cool down is in place.
This feels like discrimination or xenophobia with extra steps. If you’re international enough and have some bad luck, the systems will perceive you just like a scammer and will deny you service or require hours of intervention because of things like your name, location history, and nationality. (For those who haven’t noticed, sometimes PayPal will arbitrarily require you to create an account in order to complete a single payment. Nationality is required information in this step)
If it’s not something I really want provided only by a single seller, I will nowadays abort at merchants only accepting PayPal, and at the first failure of Stripe. It’s not worth the headache.