TIL Satan is a genie.
Also, in these games, the folks going for "more wishes" are shooting low. The only wish you need, which also defeats the monkey's paw, is "grant me omnipotence."
But: this is Satan we're talking about. The Deciever, The Traitor. Not only is this a monkey-paw situation, but a Christian Satan is going to actively try to decieve you.
I don't think I'd even trust his answer about whether there's a cost, so I'd pass on the winning lotto numbers, too.
I'd say, "no thanks" and immediately convert to Catholicism, start going to church, and lead a clean life from here on out. If the orthodox Jews are right, I'm fucked anyway since my mother isn't a Jew, so Christianity is the best bet.