Normally around 1k uniques a day you can start to generate interest, depending on content of the site, once you get above 2k-3k month you can get places like tribalfusion to be interested or fastclick (I think that is the name)
Yes, some of the larger ad agencies / networks are Tribal Fusion, ValueClick, FastClick, Burst! Media, etc. Don't underestimate the power of text links. They can be very valuable in getting your site well indexed by the search engines and consequently can run into the thousands per month for a run of site link on a high profile site.
Uniques dont really matter much when you are advertising its the page views that matter the most. There is no set figure either, depends on the niche, if you are a small site but only site in a niche then you can get good advertisers very quickly.
You can advertise your website even before any visitor comed to your website. It is recommended to make some fake users, fake action to get the website to life.
Also, keep in mind that search engines doesn't look any more for large amonuts of users, so the first of all you will have to think to a great content.
Well, I just started about a month ago. I am not up to speed on all the pageview stuff etc, but (let me see.. sec..) this is what I got my first 3 weeks:
Total Sessions 52,262.00
Total Pageviews 1,070,594.00
Total Hits 1,714,695.00
I am not sure who I can go to to get banners on my site. Yes it was our first month (3 weeks actually as we did not open the site till the 11th of October) and those numbers were from Oct 1 - Oct 31).
So, we added some google banners. Well, Google cancelled us the first of November. They said we were clicking our own banners. I sent them all the login info in the world to logs to show we did not, but I think they just did not think we could get that kind of traffic that fast. So, here I am now needing a new ad banner company and have no idea who to go to. I am not worried about the ad revenues, although that is nice, I just really wanted the banners to fill empty spaces.
So, any recommendations with that kind of traffic?
I think as some of the member mentioned, you don;t really need to have a very high traffic to start with advertisement. Google adsense do allow on that basis as long as your content is comply to their policy. I have been using a lot of the publisher site but so far, adsense has the most conversion rate if you have a low traffic site.