most people use drainage.
2 of the plants in my cage i rotate out for when my guy gets a shower. and i let soil stop dripping before i put it back in the cage.
but for the most part my plants get enough water from the misting.
but i have a large cage and it has 2 drains in it.
it all depends on what kind of cage and size u use
some people drill a hole in the bottom of the cage, put a screen or something over it and put a bucket under it.
some use the walmart pullout drawer( 10$ )
i used 2 shower drains but not much drains out. and i mist the cage till it sounds like its raining in there 2 times a day and a lighter misting in the evening. i would mist more if the humidity went down or everything dryed out sooner but i dont like misting when things are still wet. mold = bad