Moreover, this kind of scam was since around October 2018, with the almost same ways.
https://www.coindesk.com/twitter-let-a-fake-elon-musk-account-promote-a-crypto-scam
And now it is there again.
One of them can be found here:
https://news.bitcoin.com/elon-musk-bitcoin-giveaway-scam-millions-dollars-btc/
Be careful about this kind of similar scam. What you need to watch out when participating in a giveaway is:
1. Never only believe in one source, you must do your own research to the official sites, social media, and also compare to the other legitimate sources.
2. Never easily tempted by big giveaway rewards, so that you aside the logic to analyze it and just follow the other friends.
3. be careful if you must send ETH/BTC first to unlock the rewards, it may be suspicious and need to watch out, better to check, and recheck again.
4. Never only tempted by the big name, you must know which one is legit and scam.
5. Last, never be greedy because greedy may lead you to play or do without logic analysis and consideration.