Who would want to? And if you write real crap you can write a ton of articles. I bet there are people who'd pay for them, too.
very easy...all copy but rewrite in own language and some change synonyms of word(meaning is same but word is different). google.com compare words, not meaning. ok
The only reason I can do 30 a day at the moment, is because my current contract is for very short articles! Very easy subject, very easy to write quickly! To be fair though, that isn't every day! Under normal circumstances I do about 15 a day. Even rewriting 1000's of articles a day is impossible in my honest opinion. The articles, rewritten or not, take time to produce and think about, especially if they are to be of a good quality.
The key is not to copy ideas. But to take these ideas and make your own out of these ideas. There are hundreds of people who make lots of articles every single day. That's a whole lot of ideas for you to feed on. What you do is you don't copy the idea and instead look for several, read them and then make your own out of all the information you've gathered. I think that's how some people never run out of content.