Distribution of the normalized richness estimate λ_norm Eq. (3) assigned by eROMaPPer. The bins are equidistant, while the x-axis is displayed logarithmically. The distribution of 5721 extent-selected clusters (K24), filtered in the same way as the misclassified clusters, is displayed in the background to guide the eye. A dashed line indicates the median of each distribution. We do not split the sample by Class here as the distributions are similar.