Communism

For some goods and services, I suppose, but not the backbone of the economy, and certainly not in the near future. If the Global North has a revolution and transitions to Socialism, it will need to focus on re-industrialization in the short term, and likely would not benefit from some form of extended NEP, ie a focus will need to be had on central planning and full public ownership to drive rapid development.

Once all industry is publicly owned and planned, small gifts can exist to temporarily fill in gaps not covered by the rest of society. Once the productive forces are developed enough, it might look similar to a gift economy anyways, like a not-sci-fi version of Star Trek.

Gift economies aren't something I can "support," rather they would only be a small part of a much larger whole to begin with IMO.