No effect at all on my thoughts or opinions posted on FlyerTalk. As you might guess, like the poster above me, what i post is based upon actual experience with a travel provider.
Now, I may be influenced to try a particular travel provider whom i see advertising on FlyerTalk or register for a particular bonus if it is offered since I find it easier to see these things on FlyerTalk than buried or forgotten in some email from one of my programs.
For instance, I noticed the pretty big bonus miles for the new USAir credit card that is advertising on FT. I'm considering it as i had not heard of it before.
But effecting my impartiality? No way.