Hey dboundary,
1. I created the first ones with the account creator ( I bought twitter accounts on fiverr, which came with Hotmail accounts) I used the invite code generator to get some invite codes then the account creator to create the accounts.
The rest I just purchased on fiverr. I went for a gig with full profiles and bio's, and that were created with unique IP's (apparently, there's no way to tell really), these accounts weren't perfect, so I had to log in to a few of them and fix images/ bio's, but they do the job.
2. I don't go crazy with the bots, I paced things, Initially I run the popular pin submitter, then just slowly follow and like, and then repeat the process, once the account has folowers o it's boards, I start with the Amazon bot, again, slowly.
I only used around 10 accounts per IP (I have multiple servers at Rackspace), I shut my servers down when I'm not using them, like over Easter weekend, then when I need a server again I restore one from a server image, every time I do this Rackspace gives me a new IP.
Also, I don't use multi threading, easy does it, lol. All my accounts are still up, growing daily and clicks are steady.
Hope this helps,
TD