What's the alternative? Not release the model at all?

"Make the guardrails better" isn't very hard and probably not worth the effort.

The alternative is to be explicit when you nerf, so users know what they are working with.

I guess people would just game the system and find ways around these guardrails.

They have enough info on you and your sessions to eventually catch you, label you as bad faith actor and ban you automatically. I don't think many would risk it.