How many people have actually donated 150 Euro or more? Maybe 10-15? While this is cool and all, how much testing can you really do with such a small group? While you can do stuff like bug testing and see if items work properly, you can't really test performance. Might be smart to lower the donation limit for Alpha access. Not only will this improve the Alpha test because the more people, the more problems you can find, it will also lead to more donations as the limit is lower, which makes people donate just that little bit easier