Omaze, the leading online fundraising platform that offers once-in-a-lifetime experiences and prizes to support charities around the world, announced the close of a $30 million Series B round led by FirstMark Capital. Additional investors include Causeway Media Partners, BDMI, Tusk Ventures, Inherent Group, Gaingels, Penni Thow’s Copper and Guy Oseary. Co-founded by CEO Matt Pohlson…