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.
Not sure if this is an old post or not? I'm writing this on 18/11 lol You need to go to your bitcoin wallet (where you sent funds from) there will be a receiving bitcoin address, copy that and send to vendor. Hth.→