Adjust package score frecency factor

app/flatpages/help/top_packages.md

@@ -19,7 +19,7 @@ score       = avg_downloads + reviews_sum;
 ## Pseudo rolling average of downloads
 
 Each package adds 1 to `avg_downloads` for each unique download,
-and then loses 5% (=1/20) of the value every day.
+and then loses 6.66% (=1/15) of the value every day.
 
 This is called a [Frecency](https://en.wikipedia.org/wiki/Frecency) heuristic,
 a measure which combines both frequency and recency.

app/tasks/pkgtasks.py

@@ -20,7 +20,7 @@ from app.tasks import celery
 
 @celery.task()
 def update_package_scores():
-	Package.query.update({ "score_downloads": Package.score_downloads * 0.95 })
+	Package.query.update({ "score_downloads": Package.score_downloads * 0.93 })
 	db.session.commit()
 
 	for package in Package.query.all():