It is disappointing and I wonder if anything can be done to keep the product alive. I would hope the devs would alert someone, anyone if there are issues that need to be addressed.
Most of those 3rd party reviews are paid for advertisements.
You needn’t worry about us: we have good contact with Apple, and they feature us a lot in the App Stores.
To give an example, I just opened the Mac App Store, and went to the Work section for apps. We are listed in about half of the categories on the right, including Editors’ Choice. This featuring is worth much more than click bait “Top 10 note taking apps”.