You might recall the moderate sized ruckus this week when Scribd started their archive program without telling anyone. Basically Scribd decided that any file uploaded more than a few months ago was now in the "archive", and they started charging access.
The ruckus happened because one, they did not bother to tell anyone and two, they were not paying the people who actually owned the files. Now of course everyone is upset about this, but you should set aside your anger because there is a deeper issue here.
When you sign up with Scribd, they more or less made the promise that they would host your files for free. When they started the archive (without telling anyone), what they did was a bait and switch. No more, no less.
I don't trust Scribd anymore. They've shown that we can't rely on them to match their words with their actions.