I made a table a while back to see how often Diamonds and Tears came up (the only ones for which it is generally interesting to grind more than 1 or 2), and given the news figured I’d update it to include the last few months. Turns out we were actually abnormally lucky with Night-whispers → Diamonds lining up: Across 139 weeks we’d expect roughly 8.7 Diamond weeks (we got 9), and with 4 possible 62.5 item cash-ins we’d expect about 2.2 each, but we got 4 for Night-whispers! 2024-02-05, 2023-06-05, 2023-05-22, 2021-10-11.
Mrs. Plenty’s rewards are a bit worse, but the checks are about twice as easy (I think the preferred candidate is the Author of Gothic Tales, though, so that there’s some proper secondary reward scaling). I don’t have the numbers handy, but I remember seeing that the profits were better even including a few failures and dealing with the arising suspicion. Personally I don’t like grinds where “don’t worry, just fail a few times and deal with menaces later” is baked into it – feels bad, even if the numbers say things are going quite well in aggregate. But a single over-skulled bird can get you about 0.5% of a worm, which is quite tempting…