I'd rather use a lens more like all the open-source/free-software concerns about controlling your own computer:
1. Can I see how the recommendation algorithm is intended to work? The site-owner says it works for my benefit, but what if they're mistaken, or lying?
2. What has it recorded about my interests, and how can I fix bad records that don't represent them?
3. When it's not working well--or harmfully exploiting my baser weaknesses--how can I change to a different one?