You can now mine Bitcoin on this website! The Bitcoins are mined using your processor power and used to pay for the server. Any coins you mine will be transferred into your donator status. Like that you can become a donator without spending real cash! You can try it out here!
[Update:] I just wanted to add some information: It is very likely that not one individual will make a significant amount of money for the server – and therefore also not towards a long donator status. The mechanics of this tool is rather geared towards many people contributing a little and the overall sum of all the small parts then being meaningful for the server. If you realize that you make a lot of money with this (like several USD/day), you should rather likely investigate if you should not be doing this for your own benefit instead. I will be letting this running for a couple of days now and then publish some statistics here. If statistically it would make sense for the server to continue this, I will leave it up, otherwise I will shut it down.