Comment by Jyaif

FWIW 119 unique @apple addresses appear in Webkit.git in the last year.

( `git log --since="1 year ago" --pretty="%cn <%ce>" | grep "apple" | sort -u | wc -l` )

Of course there's more to Safari than just Webkit, and there's more than just committers. So yes, the number may be close to 500 in total.

Assuming a generous 500k cost per employee, we reach 250 million USD, which is less than 2% of what they get for Safari.

Safari is essentially pure profit.