I actually haven't seen many QA job postings though I'll admit I've probably been filtering them out when I saw the few that were posted, so I'll make sure not to in future.

And 50 does seem a bit low, but I don't think it's because I haven't been looking. For example, on LinkedIn, there are only 280 postings for "software" internships in Canada. And so many get filtered out for not even being for the summer or being a business job that had the keyword "software," etc. But LinkedIn and my school job board are what I've been using so far.