I would say no.
If I remember right, Tennyson, you set nice tank with non-photosynthetic corals, and there are much more cheaper, better (looking and surviving) corals and non-photosynthetic animals in stores, at significantly lesser price. But it's my personal opinion, I prefer having collection of 5 different kinds of the sun corals to 1 few polyps$150 frag of dendrophyllia

.
My tanks are not able to support most decorative sponges, some hitchhiking sponge only. And I tried Haliclona blue, spiny orange, tree orange, ball orange, this candy cane, encrusting yellow, orange white and others. If decorative sponges are doing well in your tank for 5 months or so, it's another matter.
All other inhabitants are OK: suns, gorgonians, scleros, dendro, relative of blueberry gorgonian, Christrmas tree worms, crinoids.
Pardon the mess, working on it
Even the Holy Graal on non-photosynthetic corals - dendronephthya - is as usual:
Though had coraline bleaching after treating from aiptasia, same time as sponge visibly declined.
Let see its decline:
Aiptasia burned the lower branch, it died:
(Aiptasia was upside down and retracts fast).
2 months later:
The dead part of sponge was cut off, dead tissue removed by tweezers, and live polyps' mesh was glued (super glue) to the rock.
For a few days polyps were open, then they relaxed and looks like they are melting.
11 days difference:
But again, I had seen a person that was able to keep this sponge for an year with phytoplankton feedings. Maybe she has the cleaner tank with significantly less particulates and dissolved organic content.
P.S. This sponge was never exposed to the air, at lest at my knowledge. So I can exclude this as a cause.