I'm sure most of the valuation is done behind closed doors but is there any public information on how those numbers are plucked out of thin air? Byju's was a gl

I'm sure most of the valuation is done behind closed doors but is there any public information on how those numbers are plucked out of thin air? Byju's was a glorified tutoring app like so many others and the valuation was definitely not in sync with reality.