Chances are, many of you have used different codes or plugins on your website to warn visitors when they're about to leave your site by clicking on an external link.
For example:

The URL structure of the website shown in the image above looks like this: website.com
/fcc-bin/bye?YOUR_WEBSITE_HERE
There are hundreds of similar scripts out there, and the interesting thing is that by simply swapping out the original link with your own, the page will still load - but now it includes your website as a do-follow backlink.
In fact, you’ll get two backlinks: one from the naked URL and another from the "Continue" button. It’s actually quite easy to discover sites like these using specific Google search footprints.
Cheers!
For example:

Code:
http://transition.fcc.gov/fcc-bin/bye?https://google.com
The URL structure of the website shown in the image above looks like this: website.com
/fcc-bin/bye?YOUR_WEBSITE_HERE
There are hundreds of similar scripts out there, and the interesting thing is that by simply swapping out the original link with your own, the page will still load - but now it includes your website as a do-follow backlink.
In fact, you’ll get two backlinks: one from the naked URL and another from the "Continue" button. It’s actually quite easy to discover sites like these using specific Google search footprints.
Cheers!