I've been playing with Mage Monster for a couple of days now...
First, it's mainly for affiliates. It supports a bunch of different networks (Amazon, eBay, Groupon, Tipplr, Crowdsavings, Overstock, Linkshare, Chitka, Commission Junction, Clickbank, AdSense.)
And it's actually quite simple to use, even just starting out. As I said, I am no expert, but I can already create a 5,000 page site in a matter of minutes.
Basically, it's a set of WP plugins with a desktop control panel. You enter your different CPanel details (this is where it's nice, it actually manages your sites across multiple hosts... Creating sites, posting content and it even cleans up after itself when you delete a site. Very nice.) and add a spare domain that you have lying around.
Mage Monster will then create an addon domain in your CPanel using this information.. Then you load your list of keywords, one per line, and it will create 1 page per keyword. So you can go ScrapeBox a list of keywords related to "dogs" (3 minutes) and paste those into Mage Monster, and it will go to work.
Then you set your start, end times. If you set start for 1-1-2011 and end 1-1-2013 and paste in 730 keywords... It will PUBLISH 365 of them all dated over the past year. Then SCHEDULE the next 365 to be published over the next year.
Again, I've just been starting with it and from what I can see.. It's good for picking up long tail sales. If you plug in 5,000 keywords related to "dogs," you will end up with pages ranging from dog training to 101 dalmatians to breeding etc. etc. Of course it will not rank for competitive terms (without extra work) but you're likely to pick up a LOT of pages that rank for longer tailed terms.
Now... If you've got 5,000 pages about dogs... 5,000 pages about cars... 5,000 pages about phones... 5,000 pages, etc.. You're likely to have a LOT of pages that rank well and make you a little money.
The way it works is pretty cool too.. It downloads related articles to the keyword (titles the article as the keyword) and places a few related keywords throughout the article. Spins it using either TBS or your own custom variation of translators (en|jp|gr|en will translate from EN to Japanese to German back to EN, making your content unique.)