Does anyone use 500px here?

I have an account there from a few years back. I recently notice that they have added some new features, such as making yourself available for services. You can specify your area of expertise (e.g. fashion, wedding) and upload a gallery of relevant work. If you have used this feature, have you had any success in terms of lead generation? I am also curious if anyone had success selling their photos on 500px. Browsing their website I honest can't figure out their target audience. It seems they cater more to photographers than photo buyers but I could be wrong.

It's been dusty corner with crickets for years.
Making yourself available on FB and via Craigslist, Kijiji will give more hits.

I like looking at 500px and get a lot of ideas/inspiration from them. The quality of photos (and caliber of photographers) there seems to be much higher than other sites: Flickr, Instagram, Facebook, etc. But it does seem to cater more to photographers than clients.