I have been tracking user activity by level of Vesting for the last two and a half weeks ago. (Source: Steemd Distribution page)

Daily active users under <0.1 MV has fallen dramatically - from over 4,000 to under 2,000. This loss is surely spam / bot accounts.

However, daily active users above >0.1 MV is rising gradually. I'd expect a majority of these to be actual accounts which contribute to Steemit.