It’s not just daily 100s though. Mileage matters. 10 days with 10 miles and 100 score aren’t the same as 10 days with 100 miles and 100 score when it comes to your overall score.
Pretty sure you're correct here. I've done my own calc's which showed that miles per day are weighted when applied to get the total score. Not weighting the miles daily gives me an overall score much different from the app.