Amazon calculates a product’s star ratings using a machine learned model instead of a raw data average. The machine learned model takes into account factors including: the age of a review, helpfulness votes by customers and whether the reviews are from verified purchases.
I use this with the open source Companion software from Bitfocus. I'm able to use it with all of my studio gear and it's superb for what I need. It controls my MOTU mixer, my ATEM Mini Pro, my mimoLive software, my HomeAssistant lighting.