I personally don't think there's any conspiracy involved at all.
I think somebody in management over at CBS took a look and said: "We've got this ultra-popular website that's getting X number of hits per day. Why aren't we making more money off this than we are?" After which the proverbial unspoken remark was left dangling in the silent room: Because if we
don't start making more bucks off this
real soon - it's gonna be shut down.
Next followed a mad scramble of meetings as all the people involved with Download.com put on their thinking caps and thrashed about for ways to 'monetize' the site.
And the rest, as they say, is what you're seeing now.
I don't think it was evilly motivated. It's just a bad decision made by some people who have their heads in a noose.
The real problem is that many developers don't have the resources in time and money to advertise and host their own downloads. So once download.com goes away (which there's a 50-50 chance it will if it either can't "make it's numbers" - or generates enough negative publicity that it becomes seen as a pariah) it's the developers that get hurt in the end.
Boned if you stay; or double boned if you leave - or it shuts down. In the end it amounts to the same hard thing. Those who create (software developers, artists, writers, musicians, etc.) pay a heavy price to do what they do.

Nothing new there. It's been going on since the first Renaissance prince appointed a court composer, and then put
his own name on everything the poor composer wrote after that.