Sadly, they haven't worked on the lottery... yet*. Starting small is good:
Back when I wrote about The Penderwicks on Gardam Street, I mentioned that I wanted a list of the books Jane read/thought about/mentioned. A week later, Publishers Weekly ran a Q&A with Jeanne Birdsall, and followed it up with a list of Jane's books! Hooray!
Therefore, I have magical powers. See the logic there?
*Though for them to work on the lottery, I suppose I'd have to actually buy a ticket. But I figure magic is magic, and I shouldn't have to buy a ticket -- I should just be able to find a winning (and unsigned!) one on the ground somewhere.