Are there examples of cloned repos that don't grant these further rights?
GitHub and GitCode do not provide an easy way to search for these, so you will have to scrape the API and clone the repos to find out the ratio of FOSS/restrictive/no license.
My repos had their open source license available, so I guess we'll need to wait to see actual examples of illicit copies.
I wonder what they do with the user accounts though, might I be able to access it somehow? Or someone else..