Distribution of counts of DES Y3GOLD REDMAGIC galaxies (high-density sample) in REDMAPPER clusters. Count per cluster is calculated as the sum of membership probabilities for all REDMAGIC galaxies identified as possible members of the cluster. Shown are the distributions for all clusters in the catalog (blue) and for clusters in the redshift range 0.2 < z < 0.45 (red); this is identical to the range used in the density split analysis of DES Y1 REDMAGIC galaxies in Gruen et al. (2018).