adBTC was a Bitcoin PTC Site. that in the [ Surf Ads (PTC) Site Watchlist ]. it was a quite simple site. you just go to click earn link. then they will show you how many ads and how much amount satoshi you can earn.
click the start button.then they will open a new page to show the Ads site. then you can click back adBTC Page to see the counter. after the counter goes to zero. then you can close the ads page. that it you will get the satoshi to your balance.
2016/12/09 : today i find they change the min withdraw became 15,00 satoshi.