Although I clean as I go, the rebel in me throws the scraps I won't reuse on the floor. Just feels good not to be so good.
The scraps big enough to use automatically go in the basket on the floor. The threads go in the wastebasket because I don't want them ingested by the cats or wound around a paw.
This time of year I save the threads cut up into no more than 5" for the birds to make their nests. I'm told they will use small fabric pieces so this year will try that too.
I also don't want the threads wound up around the vac beater bar.
WARNING: I would not throw scraps down on the floor unless carpeted. You could slip and fall.