some questions about trader joe’s fertilized eggs

i’ve read a few accounts here of some of you guys throwing those fertilized (sold for food) eggs from TJs into an incubator just to see what comes out. apparently there has been some surprising success in hatch rates so i’ve been considering giving my broodiest hen a shot, cuz why not right? her last broody period was a couple months and she’s already showing signs of going broody again soon, so i know she’s determined to be a mother lol.

so, the questions: do we think it’s worth the $6 or whatever to buy a dozen just to see? or are they already tricky to hatch even with the whole incubator setup? and i haven’t been able to find any information on what breed they are. i assume white leghorns but if anyones hatched these out and has different info let me know?

edited a couple typos