The Lopes and Rodriguez study was based on a very specific sample, and a very specific type of infidelity. These results are interesting insofar as they can explain motivations for cheating amongst those arranging affairs through purpose-built platforms.
Yet, this holds only for a minority of cases and cannot explain infidelity as a broader phenomenon.
This theory also fails to satisfactorily define what commitment is. It is hardly surprising that people who actively seek affairs online with do not feel wholly committed to their relationships. But leaving it at that is too simplistic for salient analysis. For example, is commitment defined by attraction, sacrifice, ideological concerns or something else? Until we can be certain of this, it is impossible to use this study to draw meaningful conclusions.