3 個區塊用於其網站上的許多追蹤器（以及可能的廣告）。

So I found out they do provide trade-free goods: “Since 1994, Helen Keller International has provided free vision screenings for more than 2 million children in the United States and provided more than 300,000 of them with prescription eyeglasses to solve common vision problems.” – but they also provide access to some trade-based services: “We are improving access to high-quality, affordable cataract surgeries for poor and remote communities in under-served regions of Asia.” (https://www.hki.org/what-we-do/saving-sight/)

當然，他們為窮人提供負擔得起的白內障手術是件好事，但這並不是沒有貿易的。所以我不能給他們 5/5 的區塊，儘管他們看起來是一個有著良好意圖的偉大組織。