You're assuming gil has no value. The economy hasn't got to a point where gil has no value, so why anyone, regardless of how much they have, would "toss" it for extra damage is utterly ridiculous. Gil will, at some point in this game be much more valuable than it is now. SE will add gilsinks and anyone with gil flowing out their ears are likely waiting for that moment in time so they can bask in the glory of the newest and greatest items on the day of their inception.

Your examples of brand names have literally no application to FFXIV or Gil.