I have an AP and I have more than 75 points purchased direct from Disney, so this isn't my personal battle... and I usually stay far, far away from controversial things here... but I believe that if a particular benefit is only going to be offered to some
DVC owners but not other DVC owners, then the description of that benefit should contain the restriction. People should not be left to speculate based on what is printed elsewhere on the web page and which may or may not apply, or based on prior experience, or based on general knowledge gained from being a regular on a wonderful message board.
The description, as quoted above, says, "This benefit is valid for the Member and up to 7 guests with tickets to this event."
If they want it to be restricted, they should say, "This benefit is valid for DVC owners who have purchased [insert rule here] and who have tickets to the event, and up to 7 people who have tickets to the event and who enter the park with the owner."
I believe that clarity is important to prevent disappointment.