Why does it seem that unhyped Wii games become 1 mil sellers?

[dib8rman]

Nights was niche?

I haven't heard of anyone liking it.

I bought it to understand the concept in it's creation.

It seems like a sonic the hedgehog game but instead of speed it's flying.

I don't know what I expect from the game but it wasn't fun in the end, it damn sure wasn't fun in the end.