This topic came up in a pretty big
DVC Rental facebook group last night (around 40K members) and has around 300 comments so far. One of the posters who identified herself as an owner for one of the Resale Companies said one of her regular clients received such a letter (they apparently are Club 33, with over 4,000 points).
The flip side of this, is the owner of the resale/rental company that has the bulk of the Aulani listings also is commenting on that thread saying they have no idea how anyone could own enough points to commercially rent. The whole thread was a bit of an interesting read. I debated rocking the boat and asking if the massive Aulani dump going on within their site was tied to commercial renters, but didn't feel like getting into an argument/debate on there.