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It is as legit as embedding a tweet on your website and monetizing it via ads.

Yes it is legit, it's just a link formatted by Twitter, all links put in a tweet are shortened by Twitter (as this is an automatically generated post by the #share2steem app who automatically broadcast tweets on the Steem blockchain for users willing to)

ok, thanks for confirming :)

Your balance is below $0.3. Your account is running low and should be replenished. You have roughly 10 more @dustsweeper votes. Check out the Dustsweeper FAQ here: https://steemit.com/dustsweeper/@dustsweeper/dustsweeper-faq

You're right to be worried.

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