Regarding efficiency, efficacy and incentive, free-sharing online (of recordings, live broadcasts, software and published works) outperforms market and property systems by reducing costs of production and distribution, increasing quality and access and better promoting creativity. Free-sharing online emerged within “global network capitalism” and non-capitalist networks. Free-sharing of purely informational content online challenges capitalism by eliminating scarcity. However, post-scarcity is limited by constraints on time and the capacity to filter digital plenitude. These limits create scope for alternative business models. Free-sharing online tempers capitalism’s “tragedy of the anticommons”. However, to date, post-scarcity remains incomplete.