Here's a baseline. I'm anxious to see what happens to the top graph on Sunday when the beneficiary rewards start rolling in. (SP & VESTS as curation rewards to @null on top, wallet SBD transfers to @null in the middle, wallet STEEM transfers to @null on the bottom)
The first payouts will start on 29th May 5:30pm GMT.
Total Pending Rewards stands at $3631.417 at the time of me writing this comment and presumably it'll be 25% of the 50% author rewards so roughly $450. The number of posts is increasing (we're at over 100 posts per day) but the bigger upvotes are mostly clustered on the 1st day.