How does a Craigslist Autoposter Work?

I have been reading for the past 3 days on them and have a few trials but I still have no clue what I am doing. I'm am assuming you need proxies, but how many? And do you need more than one phone verified account? How about when CL throws the random verification phone thingy at you?

Yes if you are posting on multiple categories, cities and multiple ads you must have more than one verified account