Other accounts:
You can have a look at reddthat.com or Lemmy.blahaj.zone communities from other instances and see if the downvotes count are consistent
The 36th most active instance is Lemy.lol with 143 monthly active users. Out of 47k total, that seems reasonable
I would be careful about lemmy.one
The admin has been missing for some time, a few people posted to the meta community and never got any answer