Saving duplicate/ similar images in the same board creates confusion and clutters up your feed, causing people to grow apart from Pinterest. Also, when doing group work, lack of organization can block creative and productive workflow. It will cause miscommunication and waste everyone’s time as well. Having duplicate pins can clutter up your boards causing you to become frustrated and stay away from using Pinterest (and Pinterest PRO) frequently. To add on, having to view ads while browsing can be distracting and annoying because it can break the flow of content.