For me, reviews are a primary parameter when selecting a "thing" from "a platform". So when I experience that the platform is manipulating the reviews, I not only feel manipulated (maybe all previous times I overpayed, missed opportunities etc?) but I feel that what we all do know: we are there only to make that platform a nice revenue; it doesn't care about giving it's users the best value, it only cares about it's bottom-lines, which apparently don't align with my needs.