"In the first quarter of 2012, an average of 94 billion spam emails were sent per day... There is no sign of a return to pre-Rustock spam levels."

Just 94 billion per day. That's what I call optimism.

It's less than 2/3 of what it used to be. I'd say that's a big improvement :)

...because mining bitcoins is more profitable

I definitely noticed. I used to get 70 spam emails a day and after the takedown that number went down to 4 to 7. So I'm very thankful for that.

Further proving that the war on spam is not in vain. I had always assumed it was futile because there's so many spammers, but over time I learned there's actually only a small number of spammers who are responsible for the majority of spam.