ΔA_II vs. long-cycle amplitude in the OGLE I band. The red and black dots represent binary systems classified as ellipsoidal and eclipsing, respectively. In addition, we show the location of OGLE-LMC-DPV-097 and OGLE-BLG-ECL-157529, as they represent extreme cases of changes in the morphology of the light curve. The dashed blue line traces the case of OGLE-BLG-ECL-157529, whose decrease in the long-cycle amplitude is associated with a reduced ΔA_II.