Comment by nonethewiser

Or Stumbleupon clone's aren't popular because there really just isnt a lot of demand for them. Stumbleupon clones already exist. People generally prefer social media and in this case I'd say Reddit more specifically.

Here is one I found with a 5 second search: https://cloudhiker.net/

It works great. It's fun. Hopefully people will enjoy it. But I dont think we need to make excuses for why its not more popular.