Even at $0.01 a HIT, that's $200 for 20,000 views.
I used a "traffic generation" service once (note once) and it seemed to operate through pop-unders/iframes on various third-rate sites with high traffic volume (MP3 download sites, celebrity news, etc).
Bounce rate was close to 100% and conversion was 0, but it made the hit count shoot off the chart. Interestingly, a lot of the hits never registered on Google Analytics but showed up on the web server logs. They appeared to be legitimate traffic (different IPs, user agents, etc).
It's possible lots of people are quick at closing pop-up/under windows.
I think I generally am quick enough to close a pop-up before the page has loaded, which sometimes/often would mean the Google Analytics script hasn't loaded (depending on how Analytics was setup - the new async loaded at the top of the page would probably have caught me, the older syncronous one at the end of the page would probably have missed me).
I used a "traffic generation" service once (note once) and it seemed to operate through pop-unders/iframes on various third-rate sites with high traffic volume (MP3 download sites, celebrity news, etc).
Bounce rate was close to 100% and conversion was 0, but it made the hit count shoot off the chart. Interestingly, a lot of the hits never registered on Google Analytics but showed up on the web server logs. They appeared to be legitimate traffic (different IPs, user agents, etc).