I can't necessarily speak to whether they have been involved with members who have been spamming each other. I'm not aware of too many businesses that are complaining about spam. Most of the complaints that go through the complaint centre are coming from individuals who may or may not understand what the rules are about. If they get a message, they may be just complaining about getting a message without going through the unsubscribe process.
If there's a complaint, the reality is that it doesn't mean that there's a violation. To the point about understanding the statistics, that might be something you would be interested in, regarding how many of the complaints are actually valid.
To your point about not-for-profits and the ability to communicate with business, the chambers across the country were heavily involved in the discussion during the time when the regulations were being considered. We had a number of chambers that had written to their local member of Parliament concerned about how things were going to proceed. Then there was the follow-up on how to comply. That was a major effort on our part.