The reason why I put a backlink in there is because the script is so resource intense on my server. ALL the links are checked EVERY single time the page loads, which results in a huge load on my server. Any site using this nulled version will be banned from using the link checker. Mr Happy, you have failed miserably.
Also, this is nothing like LinkzBot, because it is totally unique and integrated with the site.
I will make a compromise by only enforcing a link if the site exceeds a certain # of links per minute, then after that the link will appear or the site will have to pay.