@penguinpablo puts out a daily account of steemit statistics. See item 5 in the post below to see the decline you speak of, however a chart showing a longer period of time that the last 5 days shows this is not unusual.
https://steemit.com/steemit/@penguinpablo/daily-steem-stats-report-friday-march-23-2018
Thanks for taking your time and sharing this post yeah the no of posts has been declined may be the reward effect i guess
Looking at the chart though we hit a record on account creation as recently a March 14th. Note the repeating cycle. We should have another surge in a few days. Also, if you visit steem.chat there is a lot of frustration over the length of time it is currently taking for accounts to be approved. The complaining does not provide positive reinforcement for people waiting to join or considering it. Thank you for the reply and upvote!
THX for charing this post! Very interestint to see the data! 💥