Flexible hours: YES

With a Substack newsletter business, you have the flexibility to set your own schedule. There are no fixed hours or shifts, allowing you to work at your convenience. People online generally agree that this side hustle is truly flexible as it enables you to choose when and how much you want to work on your newsletter. There are minimal hidden time commitments or scheduling issues reported by users. Overall, the ability to control your schedule is a key benefit of running a Substack newsletter business, making it a suitable option for those seeking flexibility in their side hustle endeavors.