Clustered timing of reviews is unfortunately not a great metric for determining whether or not they are legitimate. Many - probably most - companies send out emails to buyers asking them to review, no compensation provided. This is pretty effective, and a big driver of legitimate reviews. The timing of those emails is determined by response rates, which tend to be better on specific days - hence the mails are batched. So for some large entities, you&#x27;ll see reviews clustering on Thursday to Saturday for example.