You are right. This is just accounts created, not active acounts.
But it does not matter... The first Million took us 4 years... The next 500k only 1 year. We can see the progress and if we steadily increase the accounts from 1.5 to 3 Million for example, those 50k active users will become 150k-200k easily.

It is not a problem that most of the old (steemit created) accounts will never return. We only need new accounts which are willing to play blockchain games or enjoy what we have created here. We don't look back...

Btw, we have created 7000 accounts since I wrote this post. 😄