system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: When Bill Gates makes those adds saying we're THIS close to wiping out Polio but just need more donations, why doesn't he just donate the rest?
gpt
There is unlimited demand for funding campaigns. So he spends his money on less publicity-prone projects and asks for world wide funding to campaigns that are simple to understand and close to finishing. Doing this is an effective way to raise even more funding to these campaigns.