My review of Free trial

I just completed the Free Trial. Your stats say I got 12919 page views. However, since you don’t allow tracking links, I can’t tell if I got any hits or not. I know I didn’t get any signups. This was not to my site, it was to an affiliate link.

https://www.sparktraffic.com/faq.html

Why I cannot use my website for a free project?
In Demo and Trial projects you can use only domains that are not yet in our database. Neither we accept shorteners, redirect or affiliate links, for such URLs please use a paid project.

Is it Adsense(and any other Pay Per Click affiliate programs) safe?
Yes, it is absolutely safe for PPC ads, we avoid clicking on ads and therefore you won’t violate any rules of these programs. In case of Adsense by default we don’t even load the ads so by default you won’t see any impressions.