This was discussed a week or two ago.

The 60K are actually accounts that transact. @ned tends to hit the inactive list since he goes so long without posting or upvoting yet is on Steemit each day reading. How many others are on here who only read?

But you are right, there are not 1M who are active each day (or even each month). We probably have around 200K different accounts active on a monthly basis.