I live in a major city in the US and it’s definitely common place here. A lot of women justifiably don’t like giving out their personal number due to the number of bad experiences with men. By using IG instead, it provides a buffer.
I have asked for and received numbers but most people typically offer some sort of social media first and then only share numbers after you’ve shown that you’re not a raging creep.
How ironic that the article talks about dark patterns but as soon as you visit the webpage you get a cookie disclaimer whose reject “button” is small text tucked away in the top right of the modal.