https://i.imgur.com/PtNFGSz.jpg
You can see his winning post there
I think one of the reasons we are not seeing more of this, is because the link in the email are not pointing to the exact area or thread where winners should post about their winnings. You have to remember these people has to register on a new forum and then have to find out where to write about their win and for some people this might be too much trouble. I would say that the email should be more specific to help people to do this. Give one link for registration and one link to a thread meant to report their winnings.
The fact that this user knew the exact thread to where he had to post about his win, is a bit suspicious. ^hmmmm^
This doesn't look suspicious to me. The guy who won in the lottery, tomos81, is a Senior member here, so I think he could figure it out where to post about his win.
Btw, I wasn't aware about that thread and now I can see a lot of interesting posts there. A guy won won $200 recently:
My user id is 3096662.
My winning seeds: https://s3.amazonaws.com/roll-verifier/verify.html?~