The initial conditions for the Fediverse could be simpler: it depends on finding enough people willing to provide instances. This requires resources, technical knowledge and skills. In other words, time and money are scarce, so why take on the additional burden of running an instance and being responsible for it? Nevertheless, there are many people, groups and organisations willing to make this effort and provide instances to everyone. This is a key characteristic of the Fediverse as a decentralised, common-good-oriented network. In this talk, I will present the results of my research into German-language Mastodon instances to provide a clearer picture of this part of the Fediverse. For example, instances with a local connection are particularly striking, with instances spanning many regions and cities. However, it also becomes clear that the vast majority of instances are provided by private individuals or small volunteer groups. Problems can arise when the costs of running an instance increase or when there is not enough time to maintain it. The talk concludes with the question of how the Fediverse's decentralised infrastructure can be shaped in the future, and what contribution organisations and associations could make to sustaining the Fediverse as a digital commons in the long run.