I haven’t heard of scrapebox before now. I personally oppose any automated scraping solutions because they are in direct violation of Google terms of service. The fact that Scrapbox, according to their own web site, uses a system of multiple, rotating proxies, and thus supposedly avoids being blocked, shows that they are using deceptive practices and should be a warning against using their service. The fact that their system allows auto comments to blogs validates my belief that their system is to be avoided at all costs.

There is no excuse for not manually putting in the time and footwork it requires to build quality links. Any automated system available is sure to eventually flag what you do as spam.