you give YOUR email i think, do you mean at the lbry.io/get page?  Ya your email goes in there and it will spit out a referral code/ add you to the list
I am not sure if one CAN buy a @lbry.io email, i would say you can't just as we cant buy @amazon.com emails ;p i think its something to do with domain registry . If they can give them out, they should be giving their mods some hehehe

@cryptomiljonare haha that LBRY lambo pic is sweet, make sure your in the Slack so i can tip you