I sincerely hope not!
Sure, I wouldn't mind a little return on the hours I have spent working on the site.
that is not it's purpose.
This is a site where potential customers can quickly review the options and make decisions. They can search on criteria and location and see a range of alternatives.
It is a site where you, as a business owner can market your products and services for free, you can be found quickly - and so it is a place where visitors will return to time and again.
As such it has value as a website in itself - both for you and the potential customer.
The reason that I insist upon a link exchange is to ensure quality links.
The reciprocal linking system works very well when the links have quality of content, so that's why we do link exchange. In short - link exchange with the site is beneficial for everybody - which is why we insist on it.