Indeed, Google has long ago died, for games. For FB community, do you mean a group perhaps? We do have a page where we publish news from time to time.
I have heard about the YouTubers way. I am not sure how to approach them. We have had 1 or 2 doing videos for PG before, on their own.
These popular game review companies, do you have any suitable ones in mind? The ones we know are either not involved in browser game or are long ago done (inactive/not popular any more). These require a fee at most cases btw but we are comfortable with this, provided they worth it.