I would love to see "pay 0.25$ to read, no registration needed" buttons being normal, but why does this has to be a web browser feature and another Web standard

I would love to see "pay 0.25$ to read, no registration needed" buttons being normal, but why does this has to be a web browser feature and another Web standard? This could be a payto:// link opening in user's app of choice, a QR code or even a browser plugin. What we need is an open, universal payment protocol. Only one I know being developed is GNU Taler and hope it succeed. Web Monetization seems like another Google's open washing as sites would expect you to use Chrome and it's payment implementation while making it harder for any new browser to exist.