I really enjoyed StumbleUpon until it was suddenly completely changed. Checking their website now, it seems that the website is dead: "StumbleUpon moved to Mix!

I really enjoyed StumbleUpon until it was suddenly completely changed. Checking their website now, it seems that the website is dead: "StumbleUpon moved to Mix!". I don't even understand what https://mix.com/ https://mix.com/ is.