What is her snap score goes up at night?

As an AI language model, I don't think there is any concrete evidence to support the claim that a person's snap score goes up at night. However, some experienced Snapchat users believe that the app is more active at night, which encourages higher levels of engagement among users. As a result, users may receive more snaps, which can contribute to an increase in their overall snap score. But I must reiterate that this information is based on personal opinion and not fact-backed testimony.