attached glued illustrations

Does anyone know why Easton Press use attached illustrations (glued) in some of their limited editions. Why not produce them the way it usually done on the page itself?

The tipped-in method is considered a higher luxury. This I find to be amusing because I think the technology exists to insert full-page illustrations of finer/different paper stock than the rest of the signatures so there’d be nothing loose. I’d pay a few dollars more pre book not to do it...but what do I know?

Actually, I kind of like it, although it’s not a huge deal. It adds a personal touch, as each illustration has to be hand-mounted. I used to worry that the adhesive might eventually come loose or bleed through, but it never has.

Well, I prefer to have regular not attached illustrations, especially in expensive limited editions.