I don't have anywhere near that many visitors per day and I've had only a couple of folks turn me down. Amazon took me, and they have great ad widgets, but commission is low. Linkshare has lots of great companies, 90% of which will take you. Clickbank will probably take you, but most of their stuff is kinda spammy. Of course, AdSense, too.
With all of these it's really not a matter of if they require a zillion visitors, they'll give you ads, but if you don't have a zillion visitors, except in specific cases, you're not going to make much.