Many men have the drive to provide resources. When no woman is immediately available the single male will look for other means to satisfy this drive. It is like a gang of egg-less penguins trying to adopt the nearest lost chick. Kinda sad really.
At the meta-level, the phenomenon of #thotaudit is a prank. However, the underlying dynamics of the thot-beta relationship are real which is why this prank has gone viral. All good jokes contain an element of truth.