Since we have to pay a fee to use the:
Have an image in our sig.
And use the affiliate program database.
Why not have the same for people who want to use an affiliate link in their signature and have the forum give these users a "red" star in their sig so that people will know that they paid for this and they are using an affiliate link.
I know that a lot of people just don't want to link to their own website or to a WSO/Classified ad here in this forum and would rather have their signature link go directly to the product.
Just a suggestion.