Allow me to clarify, what I mean is people who don't display nor play with their toys. i.e. all they do is purchase toys and keep them in storage and thus "fail to use them."

If you play with your toys, then you are using them for sure. If you display your toys... well, I guess that's a kind of usage (as much as displaying a piece of art is I suppose). But if you just put them away and do nothing with them then are you really collecting them or are you hoarding?

Playing with toys; you get the pleasure of playing with them.
Displaying toys; you get the pleasure of looking at them.
Just storing your toys; what's the pleasure in that?