I am almost sure these reviews are fake because literally all of the accounts that did it were created just minutes before they reviewed.
And as shown in the screenshot, there is very little time between each one.
The problem is that this may be a regular tactic by some developers whose games are on the popular page. They might do it to get ahead of other games or to prevent other games from surpassing them. Alternatively, it could just be someone trying to cause harm.
If I continue to receive reviews like this, I may turn off the option to rate the game, as you suggested.
Thank you so much.