nexcash had canceled me in the past (you might remember a topic about it here) due to high foreign traffic. It was the period they changed their rules because of join4free change. The funny is that they canceled my account before even sending any traffic, i was canceled for about $2-3! I think their software counts the % of non english settings and acts accordingly. My advise is to send the traffic directly to join4free, although i expect candidclicks in a while to tell that ppc programs do better
As far SE traffic, it's HUGEEEEEEEE mistake to send it to a ppc sponsor that pays few cents/click. Some ppc programs are indeed for SE traffic like the ones of gammacash and ARS. Best advice is to send the traffic to a partnership program though. It will make you the most money for sure in long term period.