I have noticed a pattern with product ratings that could lead to biased reviews. Is it legal?

Summary

The practice you’ve noticed is colloquially known as ‘review gating’, writes consumer affairs and policy professional Kat George . And no, it isn’t legal Read more Australian customer service questions I have noticed that when I get an email inviting me to review a product or service I have purchased online or physically, if I select a high rating I am taken to Google to write a review. However, if I select a low rating, I am then told “We are sorry” etc and asked what is wrong. I am not taken to Google to write a review. This would lead to very biased reviews. Is this practice legal? – Tom…

Description from The Guardian.