organization received a Charity Navigator score of 88 out of 100 in its most recent evaluation. In 2013, Sharp told Politico that like most nonprofits, SPN keeps its donors private and voluntary. In 2011, Mother Jones reported that SPN is largely funded by donations from foundations, including the Lovett and Ruth Peters Foundation, the Castle Rock Foundation, and the Bradley Foundation. A 2013 article by The Guardian said that SPN received funding from the Koch brothers, Philip Morris, Kraft Foods and GlaxoSmithKline. Other corporate donors to SPN have included Facebook, Microsoft, AT&T, Time Warner Cable, Verizon, and Comcast. Between 2008 and 2013, SPN received $10 million from Donors Trust, a nonprofit donor-advised fund. In 2011, the approximately $2 million investment from Donors Trust accounted for about 40% of annual revenue. Activities SPN provides grant funding to its member organizations for start-up costs and program operating expenses. In 2011, SPN granted $60,000 in start-up funds to the Foundation for Government Accountability, a free market think tank based in Naples, Florida. SPN also provides practical support to its members, who meet each year at SPN conferences. SPN member organizations exchange ideas and provide training and other support for each other. A spokesperson for the progressive advocacy group People for the American Way said in 2008 that SPN trained its member organizations to run like business franchises. In a 2013 statement to The New Yorker, SPN president Sharp denied that SPN was a franchise and said that member organizations were free to select their own staff and priorities. SPN is a member of the American Legislative Exchange Council (ALEC), an organization that drafts and shares state-level model legislation for conservative causes, and ALEC is an associate member of SPN. SPN is among the sponsors of ALEC. A 2009 article in an SPN newsletter encouraged SPN members to join ALEC, and many SPN members are also members of ALEC. ALEC is "SPN's sister organisation," according to The Guardian. SPN member think tanks aided the Tea Party movement by supplying rally speakers and intellectual ammunition. Member organizations As of 2015, SPN had a membership of 65 think tanks and hundreds of affiliated organizations in all 50 states. Membership in SPN is by invitation only and is limited to independently incorporated 501(c)(3) organizations that are "dedicated to advancing market-oriented public policy solutions." The SPN membership program consists of affiliate and associate organizations. While affiliate members are