Some people donate them to charity some people shockingly thrown them away.
Our Australian friend Aaron who we met in Macedonia spends his on chocolate bars "Bounty all the way mate!" We use ours on massage chairs. Back home they can be pretty expensive. In Turkey they cost 3 lira (30p)
30p for 3 minute of calf, buttocks, lower, middle & upper back, neck & head massage. Bountys are pretty tasty though :)