We looked into the data in 2015 and wrote this paper: https://arxiv.org/abs/1503.07723 https://arxiv.org/abs/1503.07723 From the abstract: A common objection

We looked into the data in 2015 and wrote this paper: https://arxiv.org/abs/1503.07723 https://arxiv.org/abs/1503.07723 From the abstract: A common objection against the use of these platforms is the delegation system, where a user can delegate his vote to another user, giving rise to so-called super-voters, i.e. powerful users who receive many delegations. It has been asserted in the past that the presence of these super-voters undermines the democratic process, and therefore delegative democracy should be avoided. In this paper, we look at the emergence of super-voters in the largest delegative online democracy platform worldwide, operated by Germany's Pirate Party. We investigate the distribution of power within the party systematically, study whether super-voters exist, and explore the influence they have on the outcome of votings conducted online. While we find that the theoretical power of super-voters is indeed high, we also observe that they use their power wisely. The Related Work section may also be of interest for you.