A friendly word of warning: If it sounds too good to be true, it usually is.
1) You are not, despite several people trying to tell it to you, a "blizzard lucky player". Especially not if it is written with some spelling errors and random capitalization of the letters. So, clicking on the link provided by an anonymous Blizzard employee who can't even spell the name of the company he is working for might not be on the top ten list of your best choices of the day.
2) Any new mounts or vanity pets that Blizzard launches will be available on the PTR (Public Test Realms). They will not choose a random guy and whisper him to leave his credentials on a random website in order to get the activation code for them.
3) What the hell is a sex leg anyway???
All of the above are attempts on a scam called phishing. (A scam so common that in fact my spellchecker understood it). What it does is target unsuspecting clients of various networks, either via email or via in-game messaging, with a message to enter a site which is strikingly similar to the targeted networks site. That site is not only a fake site where you just left vital personal information, it is also typically infested with key-loggers. In case you are just dumb enough to enter the site but not quite dumb enough to enter any vital information.