I'm not against using QR codes. I just didn't realize that I could close the modal window, and thought that I had to jump through hoops to try out Sketch.
Given the amount of crap that can be found on the internet, I have a very low threshold for losing interest.
A better approach would have been to remind me later than I can scan a QR code to access the page on my mobile device.
I understand your point though. I suppose they can improve it.
2. QR codes are scary (at least for most in the American market; other countries could be different). Instead of a QR code, show a random string the user has to input. We are all used to inputting random numbers/string when doing 2-factor.
