If I’m going to lighten my wallet and weigh down my camera further with an accessory, then that accessory needs to either improve my images or my workflow in some way. If it doesn’t, then for me, personally, it’s a waste of materials and money.
A waterproof cover, a clip for mounting your camera to your backpack shoulder strap, and lens filters – I’ll buy these all day long. But a custom silicone lens sleeve, a decorative shutter button, or a creative hot shoe cover – not a chance.