Right Earning?

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I have heard that if we try to promote our blog through any traffic exchange sites, we are least possible to get paid through Adsense. Is it right what I have heard? I use Easyhits4u dot com, but not regularly, though I have many credits for my blogs already. Hits are increasing slowly and so is the balance in the Adsense account. What chance do I stand to get the amount at the end of reaching the threshold? What’s the other way round if this is going wrong?