I've observed that many people start compromising with quality after some time in order to generate more content. Its important to remember that in the long run its the quality which will keep people visiting your article/hub etc and keep a check on your bounce rate.
A related thing is value addition. Writing high quality content on your terms which is useless for others is not going to be worth it.
Last but not the least, always remember that the kind of article you are writing should be apt for the site you're writing. While hub pages provide a lot of freedom, many other sites don't. For example, Writing poetry for a website where it's not accepted or probably not valued will lead to either rejections or worse not as much success as deserved.