I think it balances out at the end, but things like giving Rob Liefeld three books probably makes it seem worse than it is.
but they are books no one gives a shit about
even when NuDC was announced no one was all "sweet, a Deathstroke book!" and the sales reflected that
give him a little corner to work in, let his fans spend their money on books no one wanted to begin with
DC makes money they can spend on keeping Scott Snyder, you don't lose sleep over Liefeld on a character you care about, and we get more images to make fun of
win, win, win