The seemingly simple tweak could be important to keeping Instagram Stories in the limelight and reducing Snapchat's first-mover advantage. Instagram tells our TechCrunch friends that 100 million people check out the Explore tab every day. When the social service has over 500 million people, that's a large chunk of the audience seeing videos they'd otherwise have missed. Only a fraction of users are likely to follow others just for the sake of their Stories, of course, but that could be enough to keep you interested in the feature after the novelty wears off.