artificial traffic inflation by such software brings zero $ and all you really cheat is your own blown up ego that is too stupid to realize that automated "free" traffic only pleases ego but brings NO benefit of any kind to anyone at all. only generic traffic - best from SE or relevant topic-pages - brings real human traffic of readers actually surfing, reading and studying your pages and eventually act or interact with you or your site.
Stumbleupon is used by real people. This isn't artificial traffic because it is sending real stumblers to your site. You can target the interests of readers by selecting the right category. I know a lot of people who would love hundreds of free visitors in return for 5 minutes of submitting. Sure, search engine traffic is better, but why not use both?
your system is about cheating cheating ALWAYS leads to failure n life or in business as well the more you cheat the deeper the crash solid unique content also may lead to more stumble results but far more importantly to MUCH more generic visitors from SE OR from happy visitors linking on their private blogs and sites cheating ONLY is done by weak ones too lazy to achieve success by means of honest work
real people it may be, but those real people don't convert to $$$. SU traffic is well known for not converting