Then again if that's what you're interested in...win-win.
I'm guessing its because they're more accustomed to using it in their home countries and when they come to Nigeria its simply an extension of that, but they are some of the more aggressive and forward groups on Tinder.
Again, one has to be careful as some of them might be (and have proven to be) in relationships or married back home and just looking for a bit of fun in Nigeria, so do your homework well.
So the first time I paid any attention to Tinder was as a result of 'amebo'.
A friend had met a guy there, who she later found out was engaged (and is now married).
But a lot of people I met on there seemed surprisingly sincere and sensible and very open about the difficulty of finding The One.