Welcome to Steemit. Unfortunately the incentives on Steemit to plagiarise and post spam in exchange for small amounts of money is pretty high, so we have to stay on top of that sort of thing... but it means that people just tag irrelevant stuff to the popular tags in hopes of getting more views and the chance at getting some upvotes.

The photogs on that list are very good, some are no longer active but many are.

What you can do is check out the Steemit Photo Challenge posts on my account, the winners are always active photographers and you can find a lot of cool stuff. I also reblog from photographers from time to time.

Hope you enjoy your stay and are successful :)