Why do marketplace apps often charge both sides of the transaction, when charging one side could raise as much (or more) revenue and be simpler?
i.e. if the marketplace knows which side of the market is less price sensitive than the other, wouldn't it make more sense to simply levy the entire fee on that side, rather than splitting it across both sides?
The guest pays a service fee that's between 6 and 12% ... and the host pays a flat 3%.
Why not just charge the guest 12 + 3 = 15%?