3000 clicks is alot so u must have decent amount of traffic going to your site... have u considered perhaps adding a CPA offer as well...? if it converts like only 10% of the clicks compared to ur adsense... then would a CPA that pays $2 for email subit u would get like $600
It's all about the market. I have a website that is primarily visited by foreigners in south Asia, and I only get like 0.02 per click there while another site that targets US gets me around 0.70 per click.