In fact, the Instax line has been quite profitable for Fuji--it's very popular with kids and hipsters. But, as noted above, all the peel-apart films are gone now. You might find some old stock at high prices, but it's not being made any more.
I'm shooting my last pack of FP-100c in my Mamiya RB-67 at the moment. I emailed the Polaroid Originals crew about reviving pack film but they said this:
Thank you for contacting Polaroid Originals. Unfortunately, that film is no longer in production. Polaroid ceased production of this film type years ago, and we are unable produce new film packs as we do not have the production machinery.
I sold my Polaroid 405 backs when Fuji made their cuts, figuring it would be the last chance to get any money for them. Not surprising that new Polaroid can't do it, unless they want to buy Fuji's production line. (tangentially, I had an RB-67 for a while too. They're great, but I ended up trading it for a Hasselblad, because it's half the size)
