Pretty hard :) We should do better (I work at AWS) to be more seamless, but we also take protecting customer data very seriously. Internally, it's quite a process, with security and legal and compliance reviews and multi-level approvals, to get access to any information associated with a customer account. I find that re-assuring!

That's one reason for the landing pages like this, which can have their own T&C and it's more clear that the information is being volunteered to team running the preview. It also means the data can be discarded when the preview is done.