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		 you can simply create 2 different campaigns and for each campaign add the banners you want, i.e.: for each niche, you add the respective banners, then you get the proper invocation code and every time the page's loaded you'll get the 2 different campaigns to show up. 
		
	
		
		
		
		
		
		
			
		
		
		
		
		
		
	
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