we do not share your data with anyone and there are many ways to control the visibility and storage life of your data here.
but the internet is a public space and you should always assume your data could be compromised.
be smart with your password, use tor or a vpn, and use pgp for sensitive communications.
I think it takes longer to complete transaction when buying with card rather than making a direct transfer. that was my experience anyway but i stopped using them :)→