I have some of those BOM but they are all on my hard drive, for the same reason above. I delete them if I don't care for them or for reasons above. I would not go into a quilt blindly and waste my stash and money.
I have some beautiful BOM's from the time I first started years ago. I have an entire BOM of castle, princess frog, landscape. I made it into a book it was so big, I am so glad I have it, for one day when I am in the mood ...I have some nice BOM's stored in files only....