Not sure if there is a way to do this, but don’t think there is.
I have an account which doesn’t get much activity and just has a small website and its using over 300MB which is mostly stats. Would be nice to have a cutoff date like more than 1 year old or something it gets deleted.
I second that.
Yes, would be nice to have them get auto deleted.
Or a addon button for “clear stats” 
… new feature ?
Wow, talk about raising a thread from the dead
Still think this is a great idea…and not just because I started the thread
What about something like this:
find /path/to/files* -mtime +180 -exec rm -rf {} \;
Could be setup as a cron job?