Absolute change in f_{ICL + BCG} versus the relative change in mass δM_200c as determined over a period of T = 1 Gyr for the Magneticum clusters. Columns from left to right split the sample into redshift bins, while the rows separate the clusters based on their current mass, going from all clusters in the top row to small and massive groups and finally clusters on the bottom row. The median line and 1σ-bounds are plotted in black, while the thin vertical and horizontal black lines show the location of zero change in either f_{ICL + BCG} or cluster mass. y₀ indicated in each panel is the median change in f_{ICL + BCG} for halos where the total mass did not change, δM_200c = 0.