If you have a scalable business, you can make your revenues grow much faster than the investments required to make it grow. For instance, you could invest ‘X’ amount in sales, marketing, R&D and so on, to multiply your revenues and customers in multiples of ‘X’ and, where your business allows you to do that, it can be called scalable. This is one indicator that anyone interested in putting money in your start-up will look for. Actually, the scalability factor is pretty high for start-ups in the e-commerce space compared to the brick and mortar models.