I am pretty convinced these stats are low because I remember the early years of Reddit feeling much less active than the Threadiverse does now and I have to assume Reddit's MAUs in 2008-9 were at least above 100K.
Regardless, this is nice to see and I recommend everyone check out [email protected] if they are interested in helping to promote Lemmy instances on Reddit.
We have an entire instance dedicated to popular 1960s television show Star Trek (don't go there)