AdBuyer.com is leading in Top 100K Sites and Top 1M Sites.
AdBuyer.com has better usage coverage in more websites categories. Including Business & Industry, Career & Education, Shopping, People & Society and 65 other categories.
Spark Studios is leading in Video Games, Antiques & Collectibles, Lottery, Graphics & Multimedia Tools and 3 other categories.
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Spark Studios is leading in Czech Republic.