Why Did the Rock Band 4 Crowdfunding Campaign Fail?

Marcus Estrada writes: "For one, many are still disappointed by how the Kickstarter project for Amplitude was handled. Were you aware that they still have not completed all rewards for that campaign?. There are those physical goodies which almost tempted me into backing which are just finally about to begin shipping out. Fortunately, the much-delayed PS3 release finally made its way out on April 11. As has been demonstrated with other projects, having an incomplete crowdfunding project while attempting to fund something else leaves many wary."