Yes, it can. When you view someone's story on Snapchat, it can contribute to increasing your snap score. However, the increase might not be very significant each time you watch a story.
Yes. The snap score is designed to reflect your activity on the platform. Watching stories is an activity that shows your engagement with the content of other users. Snapchat wants to encourage users to interact with the app in various ways, including viewing stories. So when you watch a story, it signals to Snapchat that you are actively using the app, and as a result, your snap score may go up. But it's important to note that the snap score increase from watching stories might be relatively small compared to other actions like sending a high number of snaps or having long conversations with friends on the app.