I don't get the point. Why not just send monthly payments to a programme like Ecologi (https://ecologi.com/)? Of course, if you can convince people who you can't convince otherwise, this is helpful too.
With this workflow though, you can get an extra incentive to do something. Depending on how you implement it, your actions get the extra weight of a planted tree (with each push for example). For me personally, it gives me extra motivation to work on a project and remembers me that I can do something.
https://ecologi.com/ is great! Whatever works for you. Montly payments, Continuous Reforestation, donation to reforestation organizations, etc. Let's plant billions of trees.