Originally Posted by
Tyler2017
There are places that are chip and signature that also accept UnionPay, like in Taiwan and South Korea. If it was PIN preferred, I think the card would become a problem when used there (where customer facing equipment is rare outside of major tourist areas, at least in Taiwan).
That may only be an issue if offline PIN is used. At least in the US online PIN support seems to be uncommon outside the major stores that supported debit pre-EMV (but offline PIN is generally kept enabled regardless).
BTW I added the links for the other cards. The only differences for the URLs above seem to be the [card name][card network] portion. They seem to show the correct card name/type when visited but as always, YMMV.