There is no way you can run 100k Facebook accounts now without getting banned. This isn't 2010 anymore. You are better off running a UGC campaign where you build a list of 1000 ideal Facebook users who fit your target audience to post content for you and get them to share among their friends and reshare this to 100k. I myself have farmed over 600+ Facebook accounts back in the day from 2007-2009 and now even when I try to login to some of them, they are all banned and I've did it with different IP. Out of the 600+, I think I'm left with only 400 now. Lost 200 accounts for nothing. I wish I sold them at the advertising prime of Facebook's algorithm.