Man, just read what I wrote and what you actually quoted. You don't need to to upload a .dat file straight to the cloud. Download some software like VeraCrypt, put your keys into the crypto container, set a safe password and don't give a fuck about hackers. You can even upload it to the cloud and post a download link in your twitter. It will take ages to brute force a good password while there is no other way to open a crypto container.
Post a download link of your seed phrase on your Twitter? That is not a good thing to do. Why can't you get your seed phrase encrypted on UBC drive or get a paper and use passphrase with your seed phrase. What that I have never done before and that I can never do is to backup my seed phrase online. The ones that do show on wallet is the google cloud and icloud and which I have never done before because it would be too late if my seed phrase is known to a hacker.