I've seen this kind of service offered on other forums and yeah, you can actually make some money with their predictions.
But never heard of Curiosity, could be a different person offering a different service.
I'm not vouching for Curiosity but for the kind of service offered.

Curiosity123
You gotta offer some kind of trial to a reputable member here if you want to sell your service, you're new here without any kind of history.

To everyone else, you're paying for a prediction service nothing is guaranteed. Don't bet more than you can afford to lose.