I have actually the feeling that some people used some scripts or bots which caused this problem. I will have a deeper look into the logs and see what I can find. I am also trying to find a hoster which is not too expensive. It turns out not that easy. I had a look into Heroku but I am not sure about that one. There is a MySql Server with 5 MB for free and 1 GB costs 10$ a month, just the sql server. It would be possible but there wouldn't be much money for you guys left

I see what else I can find. I am so sorry that this happens