Google Just Gave Me Some Money!

I stopped using Adwords at the end of last month as my sites were earning money without using it. However, I just received this e-mail from Google:

The Google AdWords Team wants to help you make the most of your advertising experience, so we would like to offer you a 25.00 GBP AdWords credit...

Well thank you very much Google! I'll be using this to hopefully kick-start a couple of my sites that haven't taken off and to try and get Google to index some that it hasn't seemed too keen on listing so far :)