They arn't recycled to the best of my knowledge. Out of date plates and charts are considered a serious risk to aviation safety. And are disposed off accordingly so no cockups can occur.
And as flight crew arn't normally interested in flying sims when we get home they get chucked as quickly as possible. And to be honest 1 update can leave you with 100 plus plates on the floor.
Also it not normally the flight crew who do the up dates. Someone from ops who has little or no concept what a plate is just thats its a complete pain in the tits every other month to sit for 2 days updating the jeppys.
MJ