The stakes make excellent "'kindling" for fire wood starter in the winter for those that have fireplaces.
I didn't use near all my stakes from last summer and now have four stacks, about four feet high, along my fence, that is the equivilent of 1/3 cord. There are well over 400 stakes in all.
Last summer, I donated some 300 plus stakes to our city street department when the were replacing large sections of our streets. They used the stakes for supports for the concrete forms.
A friend's son, has a small landscape business and is just starting out. I keep him supplied in stakes for placing newly planted trees.
There are several folks in our neighborhood that have small gardens. We keep them supplied with plenty of garden stakes.
So, there are many uses and the stakes can be recycled to the benefit of a lot of folks. It's too bad we can say the same for the coroplast.
Let's be careful not to burn the pressure treated stakes inside or in close proximity to things that breathe. I've used stakes as furring strips behind paneling and as standouts for holding garden tools in my shed.