sokki
Yeah - that is not supposed to happen.
The whole point of the interactions is that you don't reach the cost based threshold before it happens, which is something we need to look into and tune for sure.
If you reach out to support@kagi.com, we can look into it and tell you where the cost went (assuming your threads are still there, if they are deleted then we can't tell) - as well as resetting your usage limit so you can continue using it. (you can just tell them I sent you there from this thread)
Otherwise, you can also do so by going into each thread and clicking the (i) icon to see the total cost of thread and see what models are costing you the most.
I'll bring it up internally for us to review as well.