Distribution of the maximally shared member fraction f_s,max (Eq. 5) as a function of redshift for 9518 misclassified clusters that share at least one member. f_s,max is calculated with respect to the joint member sample of other misclassified clusters and the extent-selected clusters presented by K24. The histograms in the top and right panels show projections of the distributions. The dashed red line indicates the threshold at f_s,max = 0.7 that is adopted to mark candidates as part of associations with others.