This plugin is LIVE saver. The higher your site is ranking, more attacks you have. Period.
I have good ranked site - about 20 attacks per day.
I have "nobody cares" test site - 1-2 attacks.
The attacker's software "digs" all your WP website trying to find THAT idiotic plugin and THAT stolen theme you downloaded from torrents. If such found, AUTO-hacked, your site is NOT your site anymore. It can become Spam-sender or Credit Card impersonation, what ever.
If your site is simply wiped off - you are lucky. Worst - your domain can be banned in Google.
GET THIS PLUGIN!
----> DONATE to the developer so he will not drop the project! <------