GBS - how predictable the old logbook challenge to deflect from entering into proper debate it's a well trodden path here. But let's try and bring it back to the general point and not make things personal shall we?
If as a result of your flying activities the money paid is a refund of the costs you incur then I'm questioning your commercial pressure argument.
Mr Pimp and his ladies prepaid £149 to come and fly a 1 hour trip with me to Vegas. That £149 being his share of the costs - I rent the PA28 and pay £150 per hour and so will pay £1.
If I am "pressured" to fly on an unsuitable day then the only pressure is surely a desire to get an hours flight for £1? But that isn't commercial pressure. If I repeat that process a million times I'll owe £1 million quid to the aircraft owner...