@JudgeBurrito yes, beauty detective has definitely upped their game, whereas I think BAC.net now mostly just posts when she gets promotional info, rather than actively scouting for deals. (Agree her site is the best though - I really like the A to Z calendar lists which show both the latest and previous calendars from each brand). A similar thing happened to Really Ree - she also posts much less about GWPs and deals than she used to.
My theory is that scouting for information and deals and posting multiple times a day is a lot of work with little reward. I suspect the income from affiliate links is pennies, so that at some point it just becomes not worth the effort.
I note Really Ree does quite a lot of individual product reviews, I’m guessing that as well as getting the products free this is also a bit better paid.