According to Drop Box co-founder, Drew Houston, the need for product distribution is often overlooked at start-ups. Drew discusses some marketing mistakes they made and how some guerrilla marketing strategies helped their company grow their user-base. Identify one major successful marketing activity and one failure discussed by Drew Houston in the video based on the experience of Drop Box. Discuss how the theoretical concepts you learnt in the EM course may be used to explain the success and failure you identified.