How do people on Twitter find you so quickly?

[Questioner]

I just created an account on Twitter, and I started following a few of my favorite bands. Then, not a mere hour later, I already had 2 bands following me. They were unknown bands, not-yet-famous types. I thought it was spam, but when I listened to their music, it was amazing. So I looked to see how many people they recruited, and it was only around 800 people that they were following. My question is, how did they find me so fast?

[Cyber-Medic]

They get your twitter addy from the people they follow which in your case would be the bands you follow.

[No Name]

People like that look for anybody that they can find, follow them, and pretty much try advertise themselves so they can be rich, successful , etc.