Scott Galloway believes he may have found a way to pressure Donald Trump into reversing controversial policies.

On the latest episode of “The Daily Beast Podcast,” the New York University Stern School of Business marketing professor said he has noticed that the “only time the Trump administration walks back his actions is when the markets fall.”

With Trump-friendly big tech companies accounting for a significant share of those markets, Galloway argued they should be targeted and revealed his newly launched “Resist and Unsubscribe” campaign to do so.

Watch the full episode on YouTube.

Tech companies are “highly sensitive to subscription growth or lack thereof,” he said. Galloway’s website urges people to cancel subscriptions to companies such as Amazon, Apple and Meta, which he said have “outsize influence over the national economy and our president.”

It also identifies what he calls “Blast Zone” companies that directly enable the activities of U.S. Immigration and Customs Enforcement.

“So, if you want to protest, more power to you. If you want to register people to vote, I salute you,” he said. “But the easiest way to maybe save some money and have a really big impact and send a message to the markets, to Trump and to other citizens that they can have an impact is to resist and unsubscribe.”

“This is a coin operated president and these individuals have decided that their one and only job is shareholder value,” Galloway added later in the episode.

“I empathize with that. I get it, there’s a ton of pressure. Nobody wants to go first,” he said. “But there needs to be collective action from 10, 50, 100 of the Fortune 500 to say this is just gone too far. But what is it about? It’s about one thing. It’s about shareholder value. Full stop.”