Not to shamelessly plug, but this Upwork monolith (and the general sub-optimized gig economy right now) is harmful not just for the freelancers themselves, but also the clients (from a price optimization perspective). We're trying to solve it with a blind marketplace model at ContentFly ( http://contentfly.co/ )
I've been looking for a service like yours. Are all your writers native speakers? They work "in house" or they're contracted? Thanks
Sorry for the late reply - they're contracted, and primarily native speakers from North America :)