Glad I could help. By the way, it came to my attention that GiveWell is investigating the cause area of providing glasses in developing countries: https://www.givewell.org/international/technical/programs/eyeglasses#How_cost-effective_is_the_program
This is promising, but I still endorse the general stance that B1G1-type programs have obstacles to overcome to reach effectiveness.
Glad I could help. By the way, it came to my attention that GiveWell is investigating the cause area of providing glasses in developing countries: https://www.givewell.org/international/technical/programs/eyeglasses#How_cost-effective_is_the_program
This is promising, but I still endorse the general stance that B1G1-type programs have obstacles to overcome to reach effectiveness.