Rumour has it – and folks, this is only a rumour and I have nothing to back it up – that all this traffic comes from two canadian sources . It is raw traffic that is sent through a rudimentary gambling site to your site.
This was told to me by a seller of this type traffic in confidence. I have no idea if it has merit.
The truth is that nobody really knows where it comes from. The chain leading back to the originator is a long one.