It seems like the classical "Here's our new pricing and for being a long time customer we throw in a bottle of vaseline too". Which technically has nothing to do with open source but Red Hat ( like every company in this space ) created an "ecosystem" and uses the word "open source" VERY liberally when selling you stuff. Some of their opensource software need some paid service or "maintenance" contract to work or have any value.
I'm sure Red Hat/IBM is ( mostly ) covered on the legal side, but the sausage is made in a very different way.