We buy masses online- and our garage fills up with cardboard boxes. We aim to recycle- but the sheer bulk defeats us. For one thing you have to remove the tape- and it takes a silly amount of time and is rough on the finger nails.
But, Matthew has a use for them. He spreads them over the soil, tops up with woodchip and he's then got a surface that'll suppress weeds for several years. The alternative is plastic sheeting- which doesn't rot down. He turned up this morning with his truck- and took the lot.