Does a match-making website run online lottery? It is not mentioned anywhere on the official website, so this is a confirmed scam.
However, there is no need to check the original site most of the time, because you should Never respond to a "lottery" winnings mail coming from a free email address.
Some points as a reminder:
1) Scammers could send fake emails that "appear" to come From the official website. However, you will be asked to communicate with them through another email address, which is either a free email address or an unknown domain name that was registered for the sole purpose of scamming.
2) Why would any company want to offer you prizes, gifts etc? Would they do it quietly? Ofcourse not. Any free prizes or gifts are meant for promoting their business. So if its real, the company will post the news prominently on their website, and even through a small tiny link that requires you to hunt for it.
For example, in the case of fake Yahoo lottery scams, we didn't even need to check Yahoo.com because if Yahoo is going to run an online lottery, the news will appear all over the top news sites on the web, including CNN.com etc.
So whenever you received such an email, simply delete them and DO NOT TRY your luck if you are not sure what you are doing. Some victims ended SWAYED by the scammers that "This is Real! This is Real!".