Mostly the Cubaris and giant Porcellio species are avoided when selecting a feeder/cleaner crew. This makes their purpose lean more towards being a display pet rather than a part of your pet’s bioactive home.
Cubaris can actually survive just fine, environment wise, in wetter bioactive setups. The only issue is that no one really wants to house such a species with the risk that they will become an expensive snack for their pet.
The Porcellio species is generally known for having an insatiable appetite for protein, posing a safety risk for softer bodied pets such as Crested Geckos and Tarantulas, where they will eventually begin to nibble at them when hungry. This makes the giant Porcellio species a No-No; bigger size = bigger risk.
Some pricey, and some just stunning in color, I personally enjoy keeping as a display pet in a bioactive vivarium without any pets as an inhabitant.