If you want hits or signups only from particular countries, you can advertise on sites where you can chose where your visitors will come from.
Many PTR/PTC sites enable this...
I've found three Manual surfs with trgeted advertsing:
http://Clickthru.com http://TrafficG.com and
http://EM-Traffic.com
You can surf to get credits
, you can buy them (expensive) or you can find few referrals and get credits this way.