there are some ppl on yahoo who ask for impression exchange. is it ok. i m from india. does it happen in other countries. if yes i need some ppl from other countries for this
That is against Google Adsense's TOS, sooner or later you will get banned, so be careful. Adsense account is precious handle it with care, and avoid indulging in those click and impression exchanges. It would be better if you do seo and get traffic the natural way.
Remember,don't do anything that is against Adsense TOS. If you will get banned from Google you may create a new account but what about your Home Address!