@Topgub @MaChienEstUnDick
Nobody can ever know anything with complete certainty, but that's not how we operate in the real world. Your domestic help, hairdresser, manicurist etc could all be trafficked and you wouldn't know. But as long as all the signs point to it being a consensual transaction, we take things at face value.
When an independent SW advertises, and she - or he for that matter - works basically alone, the odds are high that they're doing SW out of their own choice. Likewise if a masseuse offers extras out of her own volition.
As to entitlement, paying for something is the opposite of entitlement. When you're entitled to something you just take. You don't ask and certainly not pay. Paying for something means you recognise you have no right to it, and can only get it after negotiating a fair agreement with the other party.