Two questions mate:
- is your technique identifiable by Google's algorithms (with the risks involved)?
I'm unable to answer the first question but if your site is Adsense-linked, never ever purchase traffic no matter how small or large it is.
AFAIK, Google's pretty intelligent in detecting frauds so its best to leave it to non-Adsense sites.
yes me to suggest you don't purchase my traffic for Adsense site.
most of my sales are for sites with another ad networks as like mellowads, adalso, ..etc