I agree that the TOS change was to give CL grounds to go after major offenders, and the first targets, if there are any more, will probably be technology-based providers, not multifamily companies hiring interns or third parties to do manual postings. Even so, we decided to let the (very) few customers we were doing postings for know about the TOS. They are all conservative and opted to start doing them in house in light of this information.
Computer technology has become so inexpensive that we tend to think of Internet hosting as free. But the truth of the matter, is that CL incurs some small cost per post. A few posts here or there don't matter, but when you have many systems submitting thousands of posts per day, it adds up. Not to mention, it's easier to over post with these tools which is anathema to the folks at CL.