Some positive aspects to writing articles and selling them on the internet is that you get to supplement your monthly income. In this rough economy who can't use a few extra bucks? Another upside is that you can build up your cache of original content and increase your reputation for writing and possibly attract some higher paying customers. Lastly, just think of the knowledge you are gaining by having to research some of the topics you write about. You are, or will soon be, a fountain of useless information.
Cross Platform – Being a Mac user I prefer when I can fire up a program locally. WordAi is web based and therefore works on Windows & Macs without issue (Linux as well). SpinnerChief III Ultimate has a Web Api that allows spinning from the web, but we did not have much luck with it, so at this time we consider SpinnerChief a Windows only application and therefore requires me to run it in a virtual Windows Machine using VMWare Fusion. This one is a hard one to call because clearly WordAi wins cross platform, but it doesn’t have all the extras that SpinnerChief offers.
4. Tier 2 content (content that is keyword rich and relevant to your niche. Doesn’t have to be all that readable, it just has to be indexable by a search engine.)– Here put same options as with the Tier 1 content situation with the only difference that you set the 1st input to “Regular.” It is important that lower tiers have a lower quality of content compared to upper tiers.