Hi there,
They do! It's called the BCG Casey Chatbot (though on occasion they use a different one)
I think the best approach is to hit a mix of free and paid resources. For example, especially for the Chatbot, I’ve found that free resources don’t always represent the most up to date versions/what you’ll see on test day. This is why I built my own Resource Guides (and BCG Chatbot simulations) - feel free to message!
