Basically zero. You can easily create properly formatted addresses, only the few last positions is a hash.
You have no idea what you're talking about. Try creating '1AndCausingClimateChange6666' and let me know when you succeed in getting the private key.
Hey Akito, those are just burner addresses. If you look at the transactions of the address, you'll see only inputs and no outputs because the creator of the address doesn’t have the private key. It’s just a burner address.