We took 3 tours in 7 years before we were finally able to buy. The first time we got a picture of us and a sundae, the second time was snacks and beverage, and the last time was fast passes for 1 or 2 rides.
I don't think you missed out on something the rest of us got. I remember reading 3-4 years ago that some people who actually purchased were able to use their points immediately for their current stay (?they might have had to move to a DVC property), but don't believe there was anything 'free' about it.
Disney doesn't NEED to entice.
Oooops, I take that back --- a few years ago, there were some ridiculously inexpensive rates at HH in the winter if you took the DVC tour. Something like $99/night for a 2 BR, and you might have even gotten the 4th night free. I'm not aware of any offers like that for on-site properties.
And, as mentioned, the early sales of OKW included a certain amount of park passes, depending on the size room you booked, until the year 2000. This was part of the purchase, not handed out because someone took the tour.