Friend.tech question…

Hey folks, I have 2 questions for people who have used this new social network/dApps.

1- Is there a minimum balance to be able to access the app? They "recommend" 0.01 ETH, but can I deposit less than that?

2- When depositing those ETH into my Base account, if I don't like the app, or I don't want to continue using it, is the private key of that account available to be exported?

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Thank you.