It probably peaked in 2014 with around 42,000 unique users.
2018 was about 20,000 people.
Total unique users since 2009 is something like 330k
The new tools I haven't really promoted at all so it is in the hundreds. The old site has been in its final state for about 6 years and is focused on D&D 3.5 so it is amazing to me it still is chugging along even with a 50% drop off...that was over a 5 year period.