LOL Chris.
There are two major problems here.
#1, as sdsinc has stated, no one wants sites existing for just generating clicks. Why? Because most of their traffic is from Google and other search engines itself. If Google wanted to, they'd display sponsored search ads instead of your site and make even more money AND get the user DIRECTLY to advertiser, so they figure that they do not need sites like these.
Most mini sites are built around the idea of bringing in revenue from Adsense or similar. And if it's not Adsense, then that does even more damage to Google. If they wanted to make the most money, they'd go the route of Dogpile.com, and replace search links with search ads. They'd probably multiply their revenue x 20. Who knows, maybe they one day will start playing around with this idea. Just wait for another financial crisis and I'm sure they'll be hard pressed to grow revenue just like they did during this one, which is why they are a good company.
But the point here is, when it comes to their search engine, they want quality sites on there, not quantity. When it comes to parked domain names, it's a different ball game. They still don't like if parked visitors are coming from a search engine, but they do like if they are type-in visitors - since the type-in market is one they cannot win over. I know for a fact that their requirements for parking partners is NO MINI SITES ALLOWED. This is a fact that has been known by many. If you are a google domain partner, you can't run google ads on mini sites. They do NOT approve it. Mini sites drop CTR and provide a not so great user experience. They want either great developed sites on their search engine, or parked domains that get the type-in visitors directly to advertiser - nothing in between.
When it comes to mass development of mini sites - make sure you host it on seperate servers. 500 sites per server. Otherwise it will be banned by Google, Bing, and soon by Yahoo (once they merge).
I believe the automated developed of mass mini sites is one of these things that has been spread around by the "domain industry celebrities" that we know, and they keep talking about it and everyone thinks it is the route to go. I believe it is not. But I guess we will see how it all turns out a few years from now.
I'd bet more money on the survival of domain parking than mass development.