After getting my initial stack years ago, I delegated it fully to @monster-curator which allowed me to earn passive returns which I sold up to this point systematically. I just checked and in the last couple of week since 20/10/2023 they seem to have stopped dropping for some reason I'm not aware of.
If you find out why, please let us know.
I'll try to keep an eye on it and if it doesn't come back within a couple of weeks I will ask around. the passive returns (which actually are just a part of the inflation to keep up with that) were the main reason I got my initial stack as the combination of exploding price selling the returns made me do well overall on SPT despite the fact that It's near worthless now and dumping it all at the top would have been a far better play. I do see an option to in a lesser way repeat this cycle but it won't work without the automated curation rewards.