They didn't "campaign" against the label. They submitted tracks from VW to Atlantic, and the label basically told them that they wouldn't give them as much money to work with since BSN didn't make enough profit. So Circa peaced out.
That is a totally legit business thing to do, if you know that the album isn't going to sell as well as you originally though based on market data (including failed sales goals of previous albums) you'd be a fool to advance more money than you are going to make back. If labels did that they'd be out of business in a heart beat.
"To be honest. In the past when we’ve been on Atlantic and we’ve been on other labels, I’ve been like download the record, I don’t give a shit. It’s not like directly affecting me. When we were in that situation, you get an advance and they take everything from you."
Direct quote from the interview. Even admits it wasn't just when they were on atlantic.
I am a fan, but I also believe in people being honest and getting what they deserve when you're not. You can't take money from someone and then tell people not to buy the album so those people don't get their money back.