AdBrite
700 websites

AdBrite is free to use

http://adbrite.com

AdBrite labels itself as the internet's ad marketplace. It provides interstitials and banner ads on a cost per mille (thousand) basis, and text ads on either cost per click or cost per action.

VS

Paid-To-Promote
270 websites

Paid-To-Promote offers both free and paid options

http://www.paid-to-promote.net/

$0.5 To $4 CPM Paid To Promote, Paid To Popup, Paid Display Banner. Statistics updated in real time, Never adjust the balance. A variety of ad formats to ...

Market Share by Top Websites

1 AdBrite is leading in Top 100K Sites, Top 1M Sites and The Entire Web.

2 In terms of market share, Paid-To-Promote is clearly lagging behind, losing to AdBrite in all segments.

Websites Categories

1 AdBrite has better usage coverage in more websites categories. Including Computers Electronics & Technology, Arts & Entertainment, Adult, Science & Education and 20 other categories.

2 Paid-To-Promote hasn't got a lead over AdBrite in any websites category.

Geography

1 AdBrite is leading in most countries, including United States, India, United Kingdom, Philippines and 58 other countries.

2 Paid-To-Promote is leading in Switzerland, Armenia, Dominican Republic, Jordan and 4 other countries.