The age of spun articles seems to be over, mostly due to better advice from more well-established people here. Search engines are getting smarter, and a computer will never be able to re-word articles fully to make them sound coherent.
Instead, it's often best if you re-write articles yourself if you're wanting different words and syntax and stuff. Plus, as had been mentioned, you'll retain reader attention a lot better if they don't feel like they're reading the writing from a robot.