Yeah, that never struck me as quite fair. Fees are usually directly correlated to square footage, but I'm not sure smaller units receive fewer packages, use the elevator less, etc. I'm a beneficiary of this as all my units tends to be small vis-a-vis their buildings, but if I were to design the system, there'd be a flat base charge for all units and then a second component based on square footage.
Maybe my argument works better in a condo (which all mine are), because it's an easy rebuttal that a co-op is simply charging $x per share.
Kevin Slater