>> reporter: shawna's ignoring corporations today. in fact, she's not planning on spending any money at all. >> i've been seeing it a lot over the last couple of days. i think the last 48 hours is where i've seen it a lot. >> reporter: shawna is participating in the economic blackout. participants are boycotting large corporations like starbucks and amazon for 24 hours friday. instead people are encouraged to go to small businesses, use cash only or not spend anything at all. >> if enough people come together, we can definitely make a difference. >> reporter: people's union usa is the grassroots group credited with the movement. the goal is to disrupt the economy and send a powerful message about what they call corporate greed. john schwarz, the founder, posted social media videos asking people to hold the line. >> because the truth is simple. we, the people, are the economy. without us nothing moves. without us there is no profit. >> reporter: but the impacts of the 24-hour boycott aren't certain. julian vogel, a finance professor at

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