The search side of that stack is the part agencies leave out until a client asks why the cloaked page has no traffic. Adspower and cloaking cover the accounts. For anything that has to rank, what I run alongside is a set of buffer sites in front of every client property, EMDs or web 2.0s with real pages, and GSA SER off a verified list feeding those. The client site never takes an automated link, so if a buffer burns you drop it and the client never notices. Add XEvil for captchas and a VPS so none of it touches your office IP. That covers the ranking half of grey work, and it is cheaper than the account rentals.