This was the situation:
I was awake at 3 am searching different things at last.fm, and then I realize that I didn't saw any jazz groups on here.
So I searched for a group called jazz (if there were any!) and joined instantly.
I woke up the next day (at 12 pm, since I slept at 3 am), and I readed on my email that I received a PM on Last.fm.
The PM was from Luzian, who manages the jazz group, telling me that I got a free album for being the member number 1000.
That is luck, just like…