Lottery Scam

I get these fkin emails from time to time that theres a big jackpot waiting with numbers and such and a bunch of info all leading up to an email to contact with all the information in the email I just got for more information I guess. So Im just wondering what the brilliant scam behind this is if anyone knows as I havent really heard of this one yet...

Let the jokes come a rolling!!

You just got to pay part of the taxes up front. Blah, blah, blah, yank pull. It's bs.

Well thats a brilliant angle.
How did you know...

I've been around. lol!