britannica.com:
(1) The company receives millions of dollars in advertising revenue.
I can guess what, in (1), "in advertising revenue" means — it means "earning on advertising".
But I can't understand why it's possible to use "in" here.
So, what specifically does "in" mean here?
And could you show me please that meaning of "in" in a dictionary for which (1) would be appropriate as an example?