The rules of engagement are thus: Commitments should amount to at least $2,000 per year for each developer the member company has on staff, which for Sentry itself translated to around $500,000 last year — $3,704 for each of its 135 developer headcount. Beneficiaries through the years have included Django, Python, Rust, and Apache. This year, Sentry has upped its own budget to $750,000, and with some two dozen additional members signed up to the Pledge at the time of writing, Whitacre is hopeful that open source software developers will see a little more compensation in the future.