That’s a matter of opinion. I suspect a big university like that quickly spends its budget and does way more than compile a dictionary. And if spelling is all you need, that still appears to be possible in front of the paywall.

For the longest time, it wasn’t free of charge. You had to buy expensive books. I fail to see a justification for the outrage. Also considering that this thread is rife with suggestions for alternatives and more dodgy solutions.