The Nigeria's Next Top Model you are referring to is not part of the show. It's called Top Model 2007 and it was a contest based in Nigeria but it wasn't part of the Top Model franchise. The whole thing was poorly put together and it was a real scam. The Nigeria's Next Top Model that is part of the NTM world is coming out later this summer and is being hosted by Oluchi, this magazine is calling her "Nigeria's Next Top Model" because she was from Nigeria...this spread is almost 2 years old.
^Well, I dunno if it's true, because I saw it on wikipedia, but it says the "Eventual winner Yin Ge (Angela) didn't receive the promoted prizes of a contract with NEXT models and work with Pantene due to her violation of the rules on the show about being signed pre-show. Although she was not signed she did indeed do runway work for a Chinese agency, which was also out of bounds with the rules."