Stop Payday Predators is a left-of-center financial services policy advocacy organization. The group is a project of the Sixteen Thirty Fund, a 501(c)(4) funding and fiscal sponsorship organization managed by the Washington, D.C.-based consultancy Arabella Advisors and are a Project of the organization Sixteen Thirty Fund. 
Stop Payday Predators claims to be supported by over 500 civil rights groups, consumer groups, labor groups, and other organizations from at 50 states.  Stop Payday Predators works to convince the Consumer Financial Protection Bureau to force short-term lenders to loan at lower interest rates.  Stop Payday Predators has collected signatures in support of a proposed regulation by the Consumer Financial Protection Bureau to require these lenders to make lower interest loans. 
The Sixteen Third Fund is a left-of-center lobbying and advocacy organization founded in 2008.  Sixteen Thirty Fund often operates alongside its charitable “sister” nonprofit New Venture Fund, which provides similar funding and fiscal sponsorship services to left-progressive organizations.  According to its founding documents, the Sixteen Thirty Fund was created with seed funding from Americans United for Change (AUFC), ACORN, USAction, the Sierra Club, and Working America.  The left-leaning publication The Atlantic called the Sixteen Thirty Fund one of the “key groups founded to resist Trump.” 
Arabella Advisors (commonly called “Arabella”) is a philanthropic consulting company that guides the strategy, advocacy, impact investing, and management for multiple left-leaning nonprofits and individuals.  The company was founded in 2005 by Eric Kessler, a Clinton administration alumnus and long-time staffer at the League of Conservation Voters who remains a senior managing partner at the firm. 
Arabella Advisors manages four nonprofits that serve as incubators and accelerators for a range of other left-of-center nonprofits. These include the New Venture Fund, the Sixteen Thirty Fund, the Hopewell Fund, and the Windward Fund. These nonprofits have collectively hosted hundreds of left-wing policy and advocacy organizations (referred to by critics as “pop-up groups” because they can be little more than websites). In 2018, Arabella’s four nonprofits reported combined revenues of $635 million.