I just tell them no thanks. sometimes they get visibly upset but one place was pushing to do it every 6 months, it just makes no sense unless they're scamming
using microsoft authenticator I just ran into this recently and searched to find it's a known issue that microsoft has no announced plan of fixing. Strange to see it pop up here separately, I guess it's becoming more common. I knew to cancel the dialogue and manually add the account without the QR code to workaround it but I'm sure plenty of people will have their accounts locked because of this
Months ago this app was randomly removed from every windows 10+ machine. Many people lost video projects that they were working on with no warning or explanation. When searching for a replacement microsoft would redirect to something called ClipChamp. This new app is no replacement unfortunately, it cannot import the old projects from the video editor and it is filled with dark patterns trying to get the user to sign up for a paid subscription. Anecdotally it is much less intuitive to use and offers no customization for where to save the videos. Please follow the arcane instructions in the link to restore the old application and automatically import any old projects that were saved on the harddrives of you or your family's computers.