The first week of any tribe distribution is difficult. It requires a reasonable decentralized initial stake distribution and enough content that the reward pool gets spread out.

In the case of ProoOfBrain, only 9 people had stake and like 85% of it was one person and 12% a second person, and the other 7 had the rest. There is no scenario this would work out unless they carefully voted small percentages to many unique authors.

The situation here was completely avoidable and was negligence at an extremely fragile time of the distribution process.