Wow, you read a post about footprints and then copied and pasted it into a new thread. Fail.
Alright, so forget about registering, confirming email and dropping in a link. Lets just say you wanted to get together 10 million forums to eventually create profile links to. Still impossible in 30 seconds! Every search you perform will only ever give you 1000 results. Yes, the search engine will give you an estimate of the total number of cached pages but they will only ever show 1000. That means you need to perform 10k searches for 10 million results! Oh and those 10k keywords would have to be completely unique and give 1k unique results each and every time!
Alright, I did the search for
BUSINESS "powered by vbulletin" site: /forum
and Google says it took .31 seconds. Lets forget about copying all of the results and saving them to a file or anything else. Lets just say it takes .31 seconds per search. That means that in 30 seconds you would could only perform 97 searches which leaves you with 97k, not necessarily unique, results. Not even 1% of the claimed amount.
Oh yeah, and they have to be D0F0110W as well huh? I can't believe anyone is even thanking you for this. Hey, READ THE DANG STICKIED THREADS. Footprints should of been one of the first things you even learned in an SEO site.
-end rant