If your data isn't in three places, expect to lose it.

No system is 100% reliable, and people usually only test their backup solution when its time to restore lost data. Having two backups means that three systems need to fail at once to cause a problem.

That's why I think its a great idea when external hard drives come bundled with online backup.

...

As for reviews ... I hope that the negative impression fake reviews give will keep companies from using this tactic but I am skeptical.

Somewhere someone has figured out that x% of people reading the review will spot it as a fake and will lose faith in the company and y% will fall for it.

As long as Y>X they are gong to keep doing stuff like this.