One of the DISBoards Moderators called and got a supervisor on record (via an acknowledged recorded line) to state what DVC considers commercial:
Did Yes but I had to ask to be escalated to a supervisor because as I mentioned in an earlier post, the CM tried to say the whole "family and friends" line for renting, and when I further inquired, I was sent to a supervisor. She answered all my questions, ans confirmed it was a recorded...
www.disboards.com
There are lots of clarifying posts later in that thread, but that's the important one. In short: you can rent to recover up to (but not more than) your total annual maintenance fees. So, if I own 300 points, with total annual fees of $10/pt, or $3000, then I can rent 150 of those out at $20pp, or 100 at $30, but cannot exceed $3,000 in revenue.
If Disney follows through on this even a little bit, it will completely upend the rental ecosystem.