This is just a random observation on my part, and I am wondering if anyone else has noticed the same where they are.
This weekend, maybe in part because its a long weekend, I have had significantly less SPAM show up in my inbox than most other days.
Does this suggest anything I am not sure, but I am wondering if many of the SPAMbots are office machines and not personal computers in peoples homes.
Commercial or business settings will usually have bigger pipes (faster connections to the 'net) than the majority of HOs so the potential to spew out SPAM at a greater rate would be enticing.
Many organizations or companies with large networks (at least the three I have worked for with more than 5000 desktop computers) instruct their employees to log off but not shut down their computers so that they can push updates out to the machines using administrator rights which allow remote access to the computer. This means that if the computer is infected it makes no difference that the individual user has logged off because any malware, keyloggers, viruses, etc will try to install itself as a service or with administrator rights and run hidden in the background. When you log off you don't shut these programs down or stop the service because they are not registered as belonging to your User ID/profile. This practice lets the overrun machine whirl away in the background during the day and during off hours use close to 100 % of system resources to generate SPAM or whatever dirty work they choose to do.
So this being a long weekend I wonder how many people thought to shut their machines down altogether thereby reducing the number of zombie computer running and consequently the amount of SPAM drops.