http://ysshlyesehcnscptskrpai4iupxccuvfcpbxk37kclbs3rsaqmolzaid.onion/darknets.html
Normal Tor clients create short-living tunnels, while clients that run darknet sites are always connected. The more traffic a site has, the more traffic that client will have. Inversely, if a site has almost no traffic, then just bumping traffic to that site will cause a similiar bump of traffic to that client hosting that site.