I'm assuming you mean my signature link. Actually, the keyword advertising is something I make no use of and never have. Those who know my forum can check that - its a very educational student focused forum in a medical niche.
My main reason for suggesting this is actually for improving usability and participation. The are many industry specific terms on my site (currently on vB) so when terms and acronyms such as APH, PPH and others that I can define are shown in user created posts a mod automatically links those keywords to a glossary definition of the term - this allows users not so familiar with the terms to understand posts in the context of how they written. That is my only use of such a mod - Forgive me for feeling that many niche sites (ie, technical, medical, educational) could use something similar.
I added the keyword advertising / monetisation bits because frankly its an obvious 'other use' for the add on. I tried to think of all uses so that there were many carrots for development. For what its worth, the keyword advertising downsides as you mention I agree with, but thats not what I would personally use it for anyway - others might.
I'm a little insulted you find some warped alterior motive in my post feldon - I had the best of intentions and never thought for a moment it would be perceived that way. [edit] in fact, i have rewritten that post to remove keywords advertising references... people will discover monetisation uses anyway and maybe they should not be promoted so much, sorry.