What does HP do next to the desolate videotape I transport them within their envelope?

What does HP do next to the desolate videotape I transport them within their envelope?

they recycle them and use the viable parts to form new cartridges.
fill them or recyle them.
fill & vend
They probably refill them near ink and resell them. You're saving them mucho bucks make happen instead of having to construction more, they instead reuse it and resell it at full price. Unfair if you ask me, I'd rather throw it away afterwards help rescue them money.
There is computer hardware that directs the ink flow that they recycle out of it to use on 'new' cartridges.