I have seen students plagiarize co-op work term reports, which at the institution that I marked at are binary pass/fail with a near 100% pass rate (barring plagiarism). The assignment isn't long, is on a subject the students already know, and you can hand in some pretty terribly written garbage and still pass. But students still try to plagiarize on it - there's a subset of the population that wants the degree, but can't/won't put in the time to do the actual work.