I suspect that people who’ve already been involved for a while are more likely to still be involved five years later. So perhaps people should initially donate yearly, and then at some point switch to batched donations.
(But I still wouldn’t advise this. For one thing, I also expect people are more likely to drop out if they haven’t donated anything for four years, especially if the extra money has just been sitting in a big pile with the rest of their money and will feel psychologically painful to lose.)
I suspect that people who’ve already been involved for a while are more likely to still be involved five years later. So perhaps people should initially donate yearly, and then at some point switch to batched donations.
(But I still wouldn’t advise this. For one thing, I also expect people are more likely to drop out if they haven’t donated anything for four years, especially if the extra money has just been sitting in a big pile with the rest of their money and will feel psychologically painful to lose.)