Let's put it more frankly. If I were the host of those official tournaments, I would only care for the idea from the majority (number matters).
Since "Shiny prize" only belong to the 1st, or broaden it a bit, to the 4 semi-finalists of every official tourneys. That number will still be too small to urge me to take action (improving the prize). 4 out of 32/ 64/ 128 players is never convincing enough to change anything with the prize, while the rest players, which are the majority, won't even care, 'cuz even if the 1st prize is Shiny, it's not for them anyway, why should they raise up their voice just for you guys anw.
So, to sum it up, to semi-finalists, since you all belong to the minority, your idea will just be ignored. Unless you somehow can unify your respecting beloved community to speak up the same idea as yours.