Is it possible to ask a established author who’s big for a honest review and possibly a recommendation to more readers?
Is it possible to ask a fully established author for a review on here?
Depends by what you mean by an established author.
If you mean a contracted person whose book has gotten consistent collections, views and coins? Shouldn't be too hard if you throw a few bucks their way.
If you mean an honest to God author from a reputable publishing house? That doesn't exist here. Least none are willing to associate their good name with this crapstorm of a site anyways...