• You could stuff them to make floor cushions.
• Or cut them into rectangles, sew on a fabric border and have unique place mats.
• They can store potatoes.
• ​Build a house with them! Yes! They can be filled with dirt and then laid like sandbags and rendered over. Look up “earth bag building” for more info
• They make great biodegradable weed mats. just place them over your weeds/grass and cover with mulch. eventually they break down but by that time all the weed seeds have died.
• Pack them as tightly as possible with plastic grocery bags, sew them closed, draw a bulls eye on them, and use them for targets for bow & arrows.
• Turn them into cushions and pillows for outside seating.
• Use as a beach bag.

If you can't use them, maybe someone else can. List them on a material waste exchange so others know they are available.

If you're someone who would take them as they become available, get listed as a solution provider on Recyclopedia - so you can keep getting a supply of them.