I can trust someone who admits that self-interest motivates their actions more than one who claims altruism does.
Not a "broad" movement, maybe, but an existence proof of a sustained "hippie" way of life.
Is this motivated by mere self-interest or something greater than that?
Is it possible to construct or discover a way of life wherein the interests of the individual and the group are in harmony?
It's not a movement in the organized political sense, but it could be considered a kind of cultural movement. Many of the people who gather live alternative lifestyles all year 'round, and many of them do eschew the profit-motive as a way of life and ideology, AFAIK. Certainly the gatherings themselves are sans currency. People do some light bartering but it's mostly what you might call (if you had to) a "gifting economy".
The gatherings are not festivals although they are festive. They're more like religious gatherings but without the religion. Although you will religious people there, of all kinds of religions, all getting along.
Referencing your original comment, one thing they're not is disingenuous but they're also not promoting themselves. (No one pays to go to a gathering, all prep and cleanup is done by volunteers.)