Payment networks are expensive and across large portions of the global economy not worth engaging with anymore.
For example Paypal is working on PayPal World and Alipay has Alipay+, with the Eurozone working on Bluecode and Wero. Cross platform QR codes are becoming the future of earth at this point - also frees ourselves from business costs and ultimate control of visa/mastercard.
I honestly don’t think QR codes for payments are going to be a thing outside authoritarian regimes. You can’t see or trust the destination URL, so it is too easy to cover an official QR code with a phishing one.
It works in China because the people there know the CCCP can make you disappear and the widespread CCTV will catch you in the act. 
What’re you talking about? US, India, Japan, Korea, Austria, France, Belgium are all authoritarian regimes?
Presumably it also doesn’t work on URLs themselves (or if it does, it does it based on trusted URLs only) but works on data encoded within the QR (to a common standard). I don’t know why people pretend there’s a potential security issue here; maybe if we let idiots develop it.
Apps simply don’t acknowledge QRs that are wrong. The only potential real issue here is “scanning a code that isn’t the one I want to scan” which is easily fixed by displaying forenames on the app screen so you can verify it (or even adding contacts and sending direct payments to friends/family) and businesses using business codes with verified names
So… how about I freeze this topic as it’s got sufficiently off-topic and into the realms of politics?
Have a feeling that Lord Fink wants to sell because Curve is dying but IDC doesn’t want to consider a sale at such a low valuation