First of all: Your data is still protected by German data protection law, isUp.li is made in Germany, hosted in Germany.
Second: The work is going on. Today I’m proud to tell you about our internationalization. Your business is global. In addition, we maintain tracking servers in North America and Australia to check the global availability of your monitored web servers and applications.
A first screenshot right from the main authors account is listing the worldwide monitor locations for every single server monitored.