1. Search/PPC
1.1. The Big Three
1.1.1. www.google.com/adwords
1.1.2. http://www.adcenter.microsoft.com
1.2. 2nd Tier
1.2.1. www.miva.com
1.2.2. www.7search.com
1.2.3. www.adskanoodle.com
1.2.4. www.looksmart.com
1.2.5. www.search123.uk.com
1.2.6. www.adbrite.com
1.2.7. www.bidvertiser.com
1.3. In text
1.3.1. www.kontera.com
1.3.2. www.infolinks.com
1.3.3. www.trafficvance.com
2. PPV/CPV
2.1. Top Five
2.1.1. www.trafficvance.com
2.1.2. www.leadimpact.com
2.1.3. www.mediatraffic.com
2.1.4. www.addonnetwork.com
2.1.5. www.directcpv.com
2.2. 2nd Tier
2.2.1. www.clicksor.com
2.2.2. www.adoori.com
2.2.3. www.findology.com
2.2.4. www.jemamedia.com
2.2.5. www.ezanga.com
3. Mobile
3.1. Blind Networks
3.1.1. www.mojiva.com
3.1.2. www.inmobi.com
3.1.3. www.buzzcity.com
3.1.4. www.madvertise.de
3.1.5. www.adfonic.com
3.1.6. www.admob.com
3.1.7. www.admoda.com
3.2. Premium Blind Networks
3.2.1. www.greystripe.com
3.2.2. www.millennialmedia.com
3.2.3. www.jumptap.com
3.2.4. www.huntmads.com/?lang=en
4. Display/Media Buys
4.1. Self Serve
4.1.1. www.megaclick.com
4.1.2. www.mochimedia.com
4.1.3. www.sitescout.com
4.1.4. www.pulse360.com
4.1.5. www.google.com/displaynetwork
4.1.6. www.adperium.com
4.2. www.cpxinteractive.com
4.3. www.adbuyer.com
4.4. www.adengage.com
4.5. www.adblade.com
4.6. www.advertise.com
4.7. www.advertising.com
4.8. www.admarketplace.com
4.9. www.contextweb.com
4.10. www.adknowledge.com
4.11. www.admanage.com
4.12. www.casalemedia
4.13. www.rubiconproject.com
4.14. www.valueclickmedia.com
4.15. www.tribalfusion.com
4.16. www.adroll.com
4.17. www.chitika.com
4.18. www.trafficq.com
4.19. www.burstmedia.com
5. Verticals
5.1. Gaming
5.2. Dating
5.3. Ringtone/IQ Quiz
5.4. 1 Field Submits
5.5. Financial Debt
5.6. Health/Weight Loss
5.7. Insurance
6. Social
6.1. www.facebook.com/advertising
6.2. www.ads.pof.com
6.3. www.myads.com
6.4. Twitter
6.4.1. www.sponsoredtweets.com
6.4.2. www.ad.ly
6.4.3. www.izea.com
6.5. App Traffic
6.5.1. www.rockyou.com
6.5.2. www.socialhour.com
6.5.3. www.socialmedia.com
6.5.4. www.advertiser.cubics.com