It appears to me that this e-mail targeted and was sent to readers of the chipboard and that group only. If it had come from someones address book it is reasonable to believe that there would have been other e-mail addresses interspersed with the chippers.

Also this same e-mail, same exact text and attached files was sent out to one poker board http://pokerforum.ca/showthread.php?t=14301 and maybe a second one http://www.tlpoker.la/ last month. So I think it is probably someone manually harvesting addresses from the chipboard.

Cheers,
Bill