Spam on my unique lastfm catchall mailaddress

Hello,

Since a few days I receive spam on my (catch-all) email address that only lastfm known. A simple search on Twitter gave more people with this problem.

Are there e-mail addresses sold? Hacked? Or is this pure coincidence?
I gave permission to Tweekly.fm to watch my top 3 played tracks last week. They may have the opportunity to view my email address? I can't find it in my preference.

More people have noticed this problem?

Thanks

John