Ah - the closest thing I’ve heard of is the “pine straw” scam. Some landscapers firm pulls up to a cut-de-sac and tells a homeowner they have 20-30 bales of pine straw from a big job and asks if they’d like their beds re-done at a reduced bulk-rate. They then proceed to do the work and bill an exorbitant rate per bale and or inflate the total number of bales, e.g. that 20 bale leftover load is magically now 120 bales.