Mouldy dish ecosystem already evolved to a point where it can pay rent

ENDANGERED SPECIES: A new type of fauna has been discovered growing out of the local share house sink after the consistent neglection from roommates to wash the dishes. However, the delay in cleaning the mess, has actually turned into a positive, with the mouldy dish ecosystem evolving to the point where it has to contribute to the fortnightly rent expenses. This will lighten the load on all roommates rent; however, they will likely have to invest this money into healthcare due to prolonged mould exposure.