But if every code you send out gets hit by the proxy regardless of any user action taken, then the hit doesn't tell you anything but "you got the proxy's attention" which isn't much.
So far only actively downloaded codes seem to trigger this. Put in a dynamically generated "instructions.pdf" which you have to download before opening. I'm sure someone will find a way...
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We'll just switch to user-specific QR codes then, like unique links in spam mails to find out who clicked it.
But if every code you send out gets hit by the proxy regardless of any user action taken, then the hit doesn't tell you anything but "you got the proxy's attention" which isn't much.
So far only actively downloaded codes seem to trigger this. Put in a dynamically generated "instructions.pdf" which you have to download before opening. I'm sure someone will find a way...