Coz they are scared of not getting free styles anymore!!
FWIW, I think its a brilliant idea...anything that enables a company to show a profit they will look at..Proprietary styles would become big business for each of the makers.
So much so that they probably would only have to charge maybe a $1 a style..
Instead of releasing operating system upgrades, just release 100's of new styles each year - song specific styles-genre specific styles - styles for the current top 40 (much the same as SMF makers do) the lsit goes on and on.

Super idea.

Dennis