Ben Hoffman does a reasonable job of explaining why that's actually not a good way to think about it in his blog post\. He makes the case that in fact you \(or GiveWell\) should be excited about crowding out other donors\. In CFAR's case, if your donation did in fact cause someone else not to donate, it's likely they are not going to take that money and spend it on a new Tesla\. Instead they will quite likely donate it to their next best charity\. It wouldn't even be that surprising if their next best charity was in your top five\.
I think this should be a claim.