The biggest problem is DRM truthfully only effects people who buy the products (the actual consumers) it has no effect on downloaders, pirates etc. who deal strictly in copied/bootleg software. I am not sure that companies realize this, perhaps due to ignorance, perhaps due to other reasons.
I agree it's a money maker, even if it is far from 100% companies make it, sell it and make money at it. The average/general consumers have to deal with the DRM problems (having to have a disc in your drive to play, internet connection always ON, can't copy music to iPod, can't copy movie to your iPod etc.) doesn't bother professionals or pirates @ all.
If their "goal" is to keep the average joe from making a copy or 2 then it works, but if it's stop uploading to torrents, bootleg discs etc. then it's a big failor.
The bootom line is: As long as their is a market for the product, they will continue to sell it and make money on it.