You're quite correct in your statistics and what is permitted and not permitted. There is a certain level of permission in terms of what you take with yourself if you're crossing from Ontario to Quebec, for example, but to join a wine club or to have it actually shipped to Quebec is not something that you can do.
The unfortunate thing—just to make it a bit local—is that Niagara wineries have a tremendous number of visitors from Quebec. The marketplace in terms of the wineries, the cycling, Niagara-on-the-Lake, etc., is very attractive to Quebec visitors. If they were to find a wine or a winery where they really liked what they tasted, it just seems really odd that they couldn't join a wine club and in fact continue to enjoy that over time.