Good question! The simple answer is that our cofounders are immigrants and we need to support their H1B visa for them to be full-time. Unfortunately, we cannot support their visa without funding.
Furthermore, investment is a way to accelerate growth. We're now able to hire additional team members and pay ourselves salaries (I had $250 left in my bank account and $3K in credit card debt when we raised money, so we were nearly broke).
Hope this helps! - Gagan, Cofounder of Udemy