I'm no accountant, but I have to imagine when he's talking about "value" it's not exact loss of sales, but something more like "projected sales for the next 10 years" or something.
There's no way Twitter, a company that was overvalued at $43 billion, was also making $40billion a year in advertising sales.
The above post is referencing/quoting a line from the show "It's always sunny in Philadelphia", which is why people up voting it