It must be pretty funny to put some BTC on an address ... then announce some stupid picture or something and tell people it's a "puzzle" when in fact it's just bullshit and they are wasting their time.
In this case, the creator's credibility plays an important role. If the puzzles were made by someone well-known, like Elon Musk, then it would be much more likely that they are genuine challenges with real solutions and a prize at the end. Otherwise, there's a risk that it's just a meaningless set of riddles with no answer or reward, designed only to mock those who try to solve them. Since the creator is anonymous, anyone could pose as such an "author" and take pleasure in watching others struggle.
Is the creator of these puzzles known?
But how do you implicate Elon Musk in anything? for now he's in a big hole where he's lost billions.