At Aulani, we got some free vouchers for shaved ice/dole whip lol. I already did some preliminary research prior to us touring the Grand Villa there, so we mainly just checked it out for fun not expecting to get anything out of it.
Edit: they do have a promotion going on now where you can get a slight discount on the points depending on how many you buy, plus a flat incentive as well like $1k and up depending on number of points. Think you can get that incentive from the website already so don’t think you need to do a tour to get it.