I do see some change in interaction and upvote value depending on the timing of a post. My best time of the day to post is usually between 10AM and noon. I have had some great upvotes unexpectedly in the late evening, but that has been rare. I also receive some great interaction at all times, because of my ability to communicate with Indonesian members of the Steem community.
I am trying to remember that I am receiving the same amount of SP and SBD for my effort. It is just the USD value that has decreased. If USD values increase again, I will be happy about my consistent posting.
Keep pressing on. I hope you find success in all of your ventures.
Sounds like you have a pretty good thing going @sumatranate, being part of two very distinct communities. What prompted my post was the realization that a lot of the people who "used to" visit my blog no longer do... because most of my new content doesn't hit their feeds while they are awake, anymore.
I finally managed to get a (this) post out during morning hours, US time... and a whole new set of people suddenly checked in and engaged, which was pretty cool!
I believe steadiness is ultimately the best strategy on Steemit... I kept going through 7-cent Steem, and have no regrets about that!