The way Anthropic continues to get away with testing these nerfing "experiments" on customers without their consent depriving them of the model quality they've paid for is wrong.
The Windows Insider program has shown plenty of people will willingly sign up to be testers for a taste of the rawhide. Anthropic could do this in a transparent way but they continue to choose not too.
They'd probably claim "well, it's not an A/B test then, because we are pre selecting for a specific user type who signs up for this".
I don't think that's an excuse, but it is likely the reasoning.
You would prefer they experiment on everyone at the same time without a control group? Think about your answer.
Probably won't work for Anthropic because they likely want a larger assortment of users and use cases.