I don't know anything like that right now. Just to make sure I understood it well, you don't pay for the raffle, you just give out your email address, is that it? This way, companies that are sponsoring the raffle will probably use the email given to sent out information about their products.
I think I would be ok in participating in a lottery like that, but are there companies interested in that? People can just create emails for that lottery, and never use them again. If the site had a lot of traffic and companies had their banners there, I would understand why they would consider sponsoring the website, but just to get an email address that will probably be created just for that purpose I don't think so, but maybe I'm wrong.
Also what would prevent people from creating hundreds of email addresses to participate in the lottery?
I don't know if we have anything similiar here either.
Most likely if you sell your info, you will not actually win any prices. Unless its something very small value.
Most likely all those lotteries are rigged, especially if they are free. Basically "friend of a friend" usually ends up winning the jackpots who is related to the lottery owner.
I know they do something similiar maybe in Mexico or other tourist destinations with time-shares. You go to a seminar, and they put you in some "magic lottery". You rarely win anything and the point was to get you to buy the timeshare.