A greedy person who wanted to make money by selling books or movies without spending money to buy or create them might just make copies - a form of theft known as copyright violation. It is a Federal offense, investigated by the FBI that can lead to heavy fines and jail sentences.

Now suppose instead a greedy person wants to make money by selling advertising on a website, but is unwilling or incompetent to create a website of any interest to others. No interest ==> few "eyes" ==> no ad revenue...

Leeching in the form used by the website you are visiting does not literally "copy" my website's material - instead it pretends to my website to be a normal visitor while passing on to you the results via its own web page. At present such "man in the middle" schemes fall into a "gray area" of the Copyright laws.

• zero cost for creating interesting material, just "borrow" the work of others
• use that "borrowed" material to justify charging advertisers for their ads
• let the creator pay for storing and transmitting the "borrowed" material on the creator's server

• I have no control over what he chooses to surrounds my site with - a risk to my site's reputation.
• Visitors have no way of "escaping" from his site to directly visit mine
• Using my server's resources to support his scheme seems a form of theft
• After spending many hours creating my material, I object to its wholesale "repurposing" into fodder for a "get rich cheaply" scheme.

He could use the links to other sites in a legitimate way - to open the other site in its own window - which is what reputable sites do. Of course that new window would not carry his paid-for advertisements, so he chooses not to...

I hope that after considering these issues you will come to understand that "leeching" is not a reputable scheme, and that you do not want your company associated with it.