There are consumer cooperatives. Customers become members and can not only use the services but also vote on the co-ops direction.

Co-op. Our credit union is a coop, we vote on policy changes and other things.

MEC (mountain equipment company outdoors store) used to be a CO-OP., you got to vote for the board and if there were profits they were split amongst the members via cheques. But something later happened around covid and the store was failing and sold out to an investor. Now it sucks and is super overpriced.

Consumer Reports.

Is boycotting similar to a consumer union? It would be less organized and no dues to be paid so not a traditional union but still a collection of similar minded folks from different walks of life supporting each other by not using their wallet.