Many of the private colleges that set up shop on the second floor of a building are designated as learning institutions by provinces and territories, which means that the federal government is issuing study permits for people to come to the country and study at these institutions.
Many of these private colleges also work in partnership with public colleges. For example, Lambton College is a public college and Cestar is its private college wing. There's a massive proliferation of these public and private partnerships.
The students who graduate from private colleges, even as they're here on study permits, are not allowed to apply for postgraduate work permits, which creates a minefield for exploitation—for recruiters to seek to exploit these students and for public colleges to get tens of thousands in tuition fees. Ultimately, there's no guarantee that even after these massive sacrifices and this massive investment, migrant student workers will get permanent resident status.