A typical use case of the automatic redirect is for recommending content. Imagine you don't want to recommend products, instead, you want to recommend content entries of your site or blog. In this case, you wouldn't have products per se, but you would create "products" that represent those entries.
For example, you could have a set of "products" like these:
With the following information:
Only the ID, Name, and Url would be necessary to create these kinds of products because the user will be redirected to the specified Url. The product itself won't be displayed in the recommendations.
You can use all the capabilities of Pickzen to recommend these kinds of products (linking, rules, attributes, etc.) in order to improve the engagement of your site.