Shared masternodes are really helpful for smaller investors! I myself take advantage of being able to use their services because I usually don't have much of a coin to start with, so staking is hit or miss, so joining a shared masternode is usually the most beneficial situation for me when that is the case. That and it also makes it so I don't have to go through the hassle of setting up the masternode or maintaining it if I don't really want to have to as well. Since EPIC is 85% for masternodes for block rewards, that makes it even more reason to join a shared node service for someone that doesn't really have enough to stake regularly.