Lots of things consume URL’s other than security scanners in similar ways - as smarter people than me have commented, the solution most use (and I did recently

Lots of things consume URL’s other than security scanners in similar ways - as smarter people than me have commented, the solution most use (and I did recently myself) is to make the signup/signin link direct to a frontend page which makes them click to confirm. Yea, that still sucks, but you can have fun with things like this - one of my favorite things to do to figure out if an employer is snooping on my private messages in an app like say, slack, is to post a honeypot link in a DM to myself - on slack at least, it will consume the link every time the message thread is opened. So if I know I didnt open it, and I get an alert, I know someone or something has read the message. There’s tons of stuff out there like this, just assume apps are being disrespectful and plan accordingly.