OWS was fun while it lasted, but it had no teeth. It couldn’t affect public policy because it was led by the people, and legislators at the US national level couldn’t give half a crap about the people unless those people are donors. Plus, the mainstream media painted OWS as a bunch of Millennial trustafarians hanging out in the park while all the good honest people are at work. I don’t care what the MSM has to say, but they did undermine OWS’ reputation while treating old racist white men in funny Colonial clothes like they had a serious point 
I would have liked to see OWS try to elect people to congress, but that wouldn’t have happened. Besides, the Tea Party people who got elected either got absorbed into the Establishment long ago, got voted out, or both.
I can think of one reason. Bernie Sanders and his supporters want to change the rules of the game. Why would someone who is winning the game want to change the rules so that they would lose? Instead they’ll use the same rhetoric they used against OWS: “Silly Millennials living off their parents, never worked a day in their lives, they don’t know how the world really works, they just want rainbows and unicorns.” They can afford to disenfranchise the far left, because that’s only like 5-10% and a good chunk of that percentage is third party voters anyway. Also, these disenfranchised left voters won’t easily be able to unite, because their goals are too diffuse and because there’s still third party hate because of Nader.
