You're too late. Look at the massive art network established on instagram right now.
Not to mention Deviantart. It's like a child choosing their Christmas presents.

Do you think that anime has become mainstream or it's still a unique thing?

It used to be really new and cool for certain people and now almost everyone watches it(not everyone everyone but you know). Most of my friends watch anime, many kids in my school watch anime. Is it mainstream now? (sorry for my english)