Just spotted this on the Steam store page:
There's a horrible blast from the past! It's very generous I suppose, not having a fixed limit (beyond the 5 every 24 hours). I wonder if anyone has reached the 50 activations on Crysis yet.
I also wonder what is going to happen when the Denuvo servers eventually shut down. At least some are only using it as a temporary measure during the release window (like Bethesda with DOOM).