Fun fact: it is spam filtering application that makes Paul Graham famous (and rich)
PG was certainly known for that (e.g. https://www.joelonsoftware.com/2003/11/22/22-2/) but I don't think it made him rich. Selling Viaweb did.
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PG was certainly known for that (e.g. https://www.joelonsoftware.com/2003/11/22/22-2/) but I don't think it made him rich. Selling Viaweb did.