Indeed Bernard, I m just a bit surprised it went down that way so quickly for 500px.
They should rephrase that very last sentence: "The first version of 500px came to light in the early days of digital photography. At that time, everything was slightly different — the Internet was slower, 3.2 megapixel cameras were the latest buzz, digital photographers were just getting acquainted with their tools, and 500 pixels was a good size for photos displayed on CRT monitors. Over the years, the 500px platform went through a number of revisions and changes, growing together with technology and photographers, and keeping focus on the highest quality photos."
The platform is nice for keeping some photos online, for various of uses and I have found it good as a tool in some occasions, but that's about it.