It’s not Ali, it’s the individual vendors that chose whether to take PP or any other various means of payment (and most do take it, often as the sole option.)
And Ali charges like what, $1.99 extra? to use PP Express International while the CC services usually only tack on a view cents, if anything at all.
Other day when attempting to order another flashlight there (of course) the vendor did not take PP and my VISA payment was declined by my bank. Had to call and verify with them, turned out to be an extra security measure on the part of the vendor. PITA but eventually my order went through and I still don’t see a foreign transaction fee — though its possible that might be tacked on at the end of the CC billing period. Should have asked the agent, D’oh!
Of course not every vendor that takes CC over PP runs that same security check. So think in the future I’ll always select VISA when available to save the fee Ali charges on all PP transactions.