Thanks a lot for your assessment Abstract Domainer!
I was thinking that this name could be used as a platform where people give opinions about different subjects or as an independent/alternative news site (with a clear polarized point of view).
It could also work as a review site where opinions are given on different online products and/or services IMO.
Also, I understand what you say about the E instead of the O, but Does Opinier with E make you think in something other than the word opinion? Are there any other words statring with OPINI in the English dictionary that I am not aware of? I am not a native English speaker, that's why I ask.
Thanks again! Jose