As per this meta discussion I asked about, I had to reject more because the edits still don't make the question on topic. Since this is the most popular reason that I am rejecting edits, can we change the canned responses to maybe include something along the lines of that, to let suggested editors know? For example
This edit does not make the question more on topic or acceptable on Superuser. Please read the FAQ to see what type of questions should be on here, and make sure your edits would make the question acceptable
Or something to that effect?