In addition to those there is a 3rd option.
During your trial runs at village start up,you are awarded a 'free tech' item. Using this in your market level 20 slot allows you to give resources to others without getting anything in exchange, thus 'donating' to other players. Finding a trusted tribe member, probably the tribe leader, and sending him/her your donated goods. Once they revieve them, they will put them in the donation box