One of the first things that might warn you that Novasoft's SutumbleBot is a social network spamming tool is their blatant ripoff of StumbleUpon's logo.

LogoLicious Infringement

StumbleBot's logo:

StumbleUpon's logo:

Oh, wait, never mind, completely different - one has a blue background and the identical blue/green graphic is 15 degrees out. My bad.

Danger Will Robinson, Stumble Spambulator Coming Our Way

I think the other 'look out' moment is when the sales pitch is all about how to do something without getting caught:

Stumblebot is an easy to use application that lets you create thousands of Stumbleupon accounts, stumble your websites with those accounts and generate thousands of unique visitors from Stumbleupon in no time.

Stumblebot also allows you the option to post randomized relevant tags and reviews for these stumbles. It also includes a username checker and uses rotating proxies and user configurable delays between posts.

I am not a lawyer, but I'm pretty sure that if you're not violating the TOS doing all that, well, then, they must not have much of a TOS.

Novasoft - Sounds Familiar

Yes, we reviewed their Tag Automater and were not impressed - it costs almost $300 to purchase and then there is a $67/month "service" fee. It seemed like a lot of money for a tool that didn't do much.

Tool Overview

This tool is more reasonably priced at around $150, and even has a $1/2-day demo version. I was about set to pay the buck and give it a try, then I thought to look around to figure out how to terminate the demo period. Nothing. I looked on the support ticket area - this product wasn't even listed. So I decided to NOT get involved in a pay pal hassle.

I sent them an email, but as they did not respond to my previous emails, I don't really expect a response again.

I will say that, given Stumble's architecture, that it would be very possible to patch together a tool that would let you 'fake stumble' your posts with a low likelihood of getting caught.

How Worthwhile is Fake Stumble Traffic?

I had a friend who owned an okay-ish Italian place some years ago. He'd let me eat dinner for half price if I'd sit in the window seat and give the thumbs up to people who stopped to read the menu. But the food was only OK, so the people never would come back. I have to believe that if you're counting on people from stumble coming back after falling for this false-trail system then you've not quite understood what makes stumble traffic work.

Conclusion

I think self-stumbling your content is fine, and if you write good content then you'll get an appropriate level of traffic. I'd avoid this social spamming tool - not only are you violating Stumble's TOS but you're also putting your focus and emphasis in the wrong place.