We were in WDW June 18-25 of this year, and we did an impromptu DVC tour. I meant to schedule a tour before we went on our trip, and life happened and I forgot. We are interested in DVC, knew we weren't ready to pull the trigger, but wanted to do some research by visiting and talking to a DVC CM.
On our last full day, we were headed to a Beaches and Cream lunch ADR, and stumbled on the DVC model on the Boardwalk. We made a tour appointment for after lunch, when we realized we could catch some AC, get 3 FP each, and a $50 Disney gift card. I don't know if that's the norm but it's what we were given. We didn't pull the trigger, but we felt like we got some good information and got some questions answered.
Hope that helps! Good luck on your DVC quest!!