There are many type of discrimination occurs in the recommendation system, sometime its content and sometime it's products or service which tends to create Bias in our buying pattern. YouTube would only recommend you top rated or most view content irrespective of its relevance. I would suggest to follow Black and White rule, treat every purchase as 5 start rating unless it is revised by Buyer. This way we would be able to five consistent rating average including all the purchases made on the product .
I feel, technological advancement would help everyone, and we should be more ready to face it and to be scared of it. Truth is machines are made by human and they can win human but can't be human. Industry Soon Might be impacted Uber.