Value needs to be exchanged imo when energy is shared. Sometimes the value can be in trade of a good meal or useful items. All relevant to the partied involved in the transaction. It sure is something to understand your value. Another thing to request that value. And, another to understand value to one is not the same as to another. In my area of work i would never deny my services to anyone who asked. If they didn't have access to the amount of dollars i request i'd be open to trade of value in another way but working for free i don't feel has value to either party and can also undermine the professionalism of the service provider as well as the industry. We live in such a crazy society, where there seems to be perceived value when things are exorbitantly overpriced! I mean when one thinks of it, if we are exchanging energy put out that is an extremely valuable offering. When in exchange we often get back paper or plastic tokens or digital numbers exchanged via the internet. Which only have a collective value offered to them because people have a common belief or thoughts towards the number they see on the bill or screen. In reality they are not much at all LOL. It's mind blowing! And, a strange world!