As a 501(c)(3), GlobalGiving is required to follow IRS lobbying laws, which states “no organization may qualify for section 501(c)(3) status if a substantial part of its activities is attempting to influence legislation (commonly known as lobbying).” For this reason, GlobalGiving allows projects that involve themselves in advocacy, but not direct lobbying.
The IRS defines lobbying as “attempting to influence legislation if it contacts, or urges the public to contact, members or employees of a legislative body for the purpose of proposing, supporting, or opposing legislation, or if the organization advocates the adoption or rejection of legislation.”