I think the reason people are buying extra unlinked bands is so that when they do travel to Disney with the free linked Magic Bands they receive, they will have another whole set of bands which are not eligible for advance fast pass booking, but are indeed able to be used at the in park kiosks. So these people cheating the system can now pre book 3 rides then get to the park and pull infinite amounts of Fast Passes depending on how many bands they purchased separately. Always someone trying to cheat the system and make life harder for the rest of us who pay a lot of money to be crap out of luck trying to do things the moral way.