Computeractive is a UK magazine that is published fortnightly, and has been around since early 1998, I started buying it from issue 6 onwards and have bought every issue since.
Every fortnight they include at least one, sometimes two links to well known programs (albeit, older versions), the intention is that you will like it and pay to upgrade to the latest version.
The registration link will always be to the software manufacturers website.
I get a lot of paid for software this way, it is the only paid for software that I ever use.