Fake traffic - most likely bots. I've had 4,877 clicks through to my website since launching the campaign. Not a single click has accepted the cookies which means Google Analytics has not be able to register any of them. I have not had a single registration (which is free) and none of them have spent a penny on my site. My guess is... they are bots. The ad format i'm running is native ads, so you would have to assume that for someone to click on a native ad there would be a certain amount of interest (maybe not huge, but enough to at least accept the necessary cookies to view the site). I would advise people against using Bidvertiser on this basis. Alternatively, you can find out for yourself! There is a code 'MOBIDEA50' that gives you $50 free credit without needing to deposit any funds. Waste of time in my opinion but good luck either way!