@steem.engine this is fantastic! It's pretty neat to see more data visualizations coming out using the public blockchain data. Only two minor suggestions from me:

1. Rows look clickable on hover, so unless I'm missing something it may be nice to add some functionality to look closer into those.
2. It would be awesome if I could sort it by the columns
3. It may be beneficial to see which day/times generally have the most active users (or upvotes)

Just thinking out loud here, excellent work!