Everytime there's a change in pricing that was already a set precedent there's a hurdle to overcome like this, and it becomes extremely important to handle the situation delicately since 95% of possible ways to handle it could go very wrong.

I feel like the only way to really deal with it correctly if it truly must happen because of rising costs is to just admit that, like they did, but then stick to that and only that message, and just wait for the community to come around. If it's possible to provide any sorts of even vague math around sales and cost to produce this content then that context would help people understand, but there's almost no way to change a precedent for the worse on the consumer end without some amount of backlash.