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Re:Why WhatsApp Only Needs 50 Engineers for Its 900M Users by vidarh on Sunday January 29, 2023 @04:44AM (#34566490)
Note that they didn't give a time constraint.

You're right that in the short term you aim to hire where the return is highest, but in the long term that means they're right that you'd want to keep hiring as long as you get a positive return.

Re:Why WhatsApp Only Needs 50 Engineers for Its 900M Users by AmericanChopper on Sunday January 29, 2023 @04:47AM (#34566510)
No it doesn’t. It means you want to keep _spending money_.

You want to spend it on whatever has the highest return, which will frequently be on an expense other than hiring, and when it is on hiring, it will frequently be on hiring roles other than engineers.

Re:Why WhatsApp Only Needs 50 Engineers for Its 900M Users by vidarh on Sunday January 29, 2023 @11:55AM (#34569983)
In the long term, as long as each thing you spend additional money on increases your return, eventually hiring more people will be the highest returning means of increasing your return.