I wonder if there are statistics on how much of that number is forks (which people use like clones) and how much of it totally abandoned or README only or empty repositories. And also which 3k repos are those is veeery important. Just a handful high-profile repos migrating can cause a much bigger wave.

This is pretty much par for course when it comes to GitLab marketing. Made up headlines that can't be supported with facts.

Have to start somewhere! ^_^