1left I have accidentally eaten a number of A. flavorubens/A. flavourubecens when mixed with other blushers and I haven't suffered ill effects. About a week ago I also (purposely) ate some. They taste fine, and I did not suffer poisoning. I'm interested in finding some more, but there's been a spell of dry weather recently.
My theory is that a majority of "yellow blusher" poisonings are due to confusion with the fly agaric and yellow patches. There aren't any reports of amatoxins in yellow blushers, and it seems that the reported toxins are muscarine and ibotenic acid, which can apparently be cooked out. You already are supposed to cook blushers very well because they are dangerous to consume when raw.
Tldr: I eat A. flavorubens/flavourubecens and I've personally not suffered any I'll effects. Several mushroom guides have disputed reports, some calling it choice, some calling it poisonous, and some calling it into question because of the mixed reports.