As a Nigerian too, this has been one of my major challenge so I will tell you based on personal experience and observations. There are limited well paying sites available for us because they are usually targeted at tier one countries. The few ones we get, we rarely qualify for the surveys that's when they are even available. I deduced that companies are not targeting these regions. I tried and tried unending from opinionspace, palmresearch, globaltestmarket etc to no avail until I came across clixsense. Clixsense is a reputable well paying GPT site that pays you for various activities. Every now and then I get surveys that are aimed at my location and they are well paying ranging from $1 to $3. You can cash out at $10 minimum and payment is by payoneer. All you have to do is to be completely honest with your answers.