If you go to dropzone.com's forum search page and search for posts made within the last month you'll see they have over 50,000 ...so I'd say that 20,000 per month is no problemo!
This forum has had 971 so far in the last month.
Edit: Oops you beat me to it :)
This forum has had 971 so far in the last month.
Edit: Oops you beat me to it :)