Expected purity and recovered confirmation fraction as a function of extent likelihood. The expected fraction of real clusters from dedicated eFEDS simulations is shown in magenta. The error bars indicate the standard deviation derived from 18 realizations of the simulations. Blue shows the fraction of f_cont < 0.3 systems corrected for the expected number of residual contaminants. Green is similar, but for f_cont < 0.2. The difference between the green and blue line is an indication of the incompleteness caused by the stricter f_cont selection.