by loren_d_c » Fri Mar 14, 2008 12:52 pm
If you have ShopSite Pro v8.0 or newer, the feature to use for this would be the Reward Program feature, configured under Merchandising -> Reward Program.
First you would need to create categories a couple of categories the Reward Program feature and assign products to those categories. After you create the categories, you would then create a new Reward and choose one of the categories as the qualifying category and one as the reward category for that Reward. The Reward is configured so that for every X number of products in the qualifying category the shopper purchases, they can add 1 product from the reward category to the cart for free.
-Loren