Is Dave the 1st investor to explicitly say and invest in pre-product/market fit companies? I though First Round Capital also did that but the sense that I get f

Is Dave the 1st investor to explicitly say and invest in pre-product/market fit companies? I though First Round Capital also did that but the sense that I get from reading FRC team blogs is that they are quite hot on investing only after customer acquisitions costs are lower than life time value I.e. After they have proven fit. Is there anybody else other than angels?