I have never felt like I get more bites on flouro, but I definitely believe that it is a much more efficient tool than mono or copoly for most applications. I looked at the Top 5 from the river tournament the you are referring to and Marty is the only guy that I know well and I can assure you that he was using flouro and I would guess that many of the others were as well, simply because most of the guys that I know feel like it's a better tool....and most of us don't have line deals either, so it's just a matter of a guy making the decision that he thinks the advantages are worth the added expense of flouro. I know way too many guys who have done this a long time and won their share of $$$ through the years who choose to spend a little more on flouro to think that we all got duped by a scam. I also know some guys like yourself who have fished for a long time and certainly are not considered donators who still think that mono/copoly is just as good or better than flouro and I don't think that y'all are "wrong" at all...You just choose to use a different tool.
I know I've said it before on here, but I flipped with 25lb Big Game for probably 20 years before switching to 20 or 25 lb flouro on my flip rods and now if I pick up a flip rod spooled with 25 lb Big Game it feels like I've got my jig tied to a rubberband. For me, I'll keep paying the extra $$ for flouro.