Star ratings suck! Meaningless & plagued by fatal positivity flaws (100-point systems just a bad)

Sources: 5-Star ratings are so useless for recommendations that Netflix tossed its prized $1-million algorithm.

Also:

Retail Wire: Five-star ratings systems have a ‘positivity’ (grade inflation) problem?
NPR: Why 5-Star Rating Systems Don’t Work
NBC: Here’s what’s behind all those 5 star ratings

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The 100-point system isn’t really any better