And...
'we're deploying everything on this product, but we like what you have here, so could you give it to us at a reduced cost?'"
Oracle's answer will either be "NO" or if you're a big enough customer, "Yes".
They will then charge you the most they can get away with.
I'm guessing the guy from MasterCard has never heard of vendor lock-in. I just mention it because Oracle know all about it.