I'm sure it has. In yesterday's ratings release, Beck barely squeaked by the FNC show that follows him (Special Report), but he did crush his period's competition. However, I'm sure that Bret Baeir's program generates a multiple of Beck's ad-rev. So, if FNC replaces Beck with someone less controversial, and as a consequence more palatable to big-dollar advertisers (read: not Pet-Meds), FNC will be financially much better off - and that's not even taking into account Beck's salary, from what I understand was more than Greta's.
Their salary is identical - $2 mil. O'Reilly makes over $10 mil, yet only has 30% more viewers than Beck with an time slot viewing public twice as large