But they'll be competing against people that don't do that, so unless their content is really really good and unique, they'll lose in the market and either adapt or die. Maybe some mega celebrities could pull that off, but it would be pretty rare.
I mean, they could easily be doing that right now. $1.99 is high enough that the problem of micro payments isn't really a problem at that price. But they don't because it would be a terrible strategy...