Re: Even *if* it was the Russians that leaked the information
I am genuinely confused about how this could be useful to Putin. Perhaps he knows how easy Trump is to wind up and thinks this may work to his advantage. Or perhaps he is just having a laugh. That would probably be enough of a reason. After all, once you've bought your islands and your planes and your gold shit and your friends, what else is there to do with the remaining hundreds of billions you've extracted from the russian state?
That's exactly it: it's no longer about money - these players all have more than they'll ever be able to spend, even if they retired right now. It's about power (and, to a degree, avoiding boredom). Money is merely a way to keep score.
Don't expect any of these people to do something positive with that money either.