Make Big bucks by having Bots?

I have been to some seminars and webcasts, some security reseacher claims that botnet owner are making millions yearly by "renting" their bots

Some Market rate for employing Bots for Spamming or DOS

- A thousand dollars (USD) for spamming for 1 or 2 days
- Average of $0.05 (five cents) per bot per node.
- 2 to 3 hundreds dollars (USD) per hour (for spamming or DOS)

According to the Symantec Internet Security Threat Report, in the first half of 2006, there were about 4.7 millions active botnet systems. Based on the market rate with 4.7 millions bots, it becomes a big "underground" business (possibly billion-dollar business).

If you own half a millions bots, i think you will not have problem making a million within a year. This can be a good part-time business or/and to make your first million.