I've started looking into this. I'm unsure how exactly to interpret the "cost" data that can be added to statusline, but I'm on the Pro plan and have noticed that it's reporting ~$100 cost across projects I've used it on. For a week, which means I'm getting ~$200 worth for $20 in a month. That's immense value even if it's fairly off, and unless there are people paying for a subscription and using for a couple days in a month... don't want to contemplate it too much TBH given that I'm benefiting so much.
> Except the system prompt that gets prepended to your own prompt is part of the black box, and obviously should be expected to change over time
You may want to review that statement.