I'll be first to admit, that I don't get the maths.
If a startup founder's hourly rate is <potential value of work per hour> / 10 (using Author's logic).
The saving of $600 is guaranteed, assuming it takes 10 hours, the founder would be "making" $60/hour. Making it more "profitable" than working on something that could potentially worth $5000 for 10 hours (given 0.1 probability, that ends up being $50/hour).
If a startup founder's hourly rate is <potential value of work per hour> / 10 (using Author's logic).
The saving of $600 is guaranteed, assuming it takes 10 hours, the founder would be "making" $60/hour. Making it more "profitable" than working on something that could potentially worth $5000 for 10 hours (given 0.1 probability, that ends up being $50/hour).