If someone is running a giveaway, they will only really need your address and maybe some contact information. Them asking for more than that is essentially a dead giveaway (pun intended) that they're scammers. It's honestly alarming how many people fall for stuff like this.
But yeah, other than that, it looks like Twitter hacks are starting to happen frequently. Does Twitter have security issues or are hackers just relentlessly targeting high-opportunity accounts like this one? Twitter should do something to address this either way.
Yes that's what I have been saying. There is really no need to worry if you are not completely retarded. There is no possible scenario where someone would ask for money to giveaway money, it's ridiculous.