maybe. the scam is that you are trying to fool people into getting scared with a bullshit idea that their addresses are in danger for an imaginary threat from an inexistent quantum computer.
not really, the app just wants to show (mostly noob) users that they shouldn't reuse addresses after spending, since then they would be in the future in higher risk
maybe.
the scam is that you are trying to fool people into getting scared with a bullshit idea that their addresses are in danger for an imaginary threat from an inexistent quantum computer.