Sustainability and the hidden labor of openness Free repositories often mask the labor that sustains them. Maintenance, reviewing contributions, triaging security issues, and documenting code require time and expertise—work frequently done by volunteers or underfunded maintainers. Corporate beneficiaries of open-source have a moral and pragmatic stake in funding this labor. Models to sustain repositories include corporate sponsorships, grants, foundations, paid maintainer programs, and dual-licensing or hosted commercial services. Ensuring long-term viability preserves the freedom that repositories nominally offer.