Well, funny you say that, I had the exact same headache not long ago. From what I’ve seen, a lot depends on the card issuer and how strict their fraud filters are. Some banks are chill, others block everything that looks slightly unusual. Fees can sneak in too, especially with currency conversion or certain platforms. I ended up digging around and comparing stuff, and somewhere in the middle of that rabbit hole I found this thing called
Top Credit Card, which actually helped me understand which cards behave better in different situations. Not perfect, but once you get the hang of limits and verification steps, it gets way less frustrating.