I would love to get featured by them, But I don't know if they would want to do it. There are stories where people turned as little as 10$ into massive amounts of 500k-2M and they didn't post it, Part of that is the user's privacy. Nonetheless, I love stake and have a lot of respect for them.
Perhaps, they must reach to you, ask for your acceptance before they share it publicly.
I don't know about their rules to share user winnings but most likely, there should be a consensus between them and user before they can share it. If you would like to share it, you can proactively reach to Stake.com's representative on the forum.
Their ANN thread:
https://bitcointalk.org/index.php?topic=2072589.0Stunna:
https://bitcointalk.org/index.php?action=profile;u=81292 (representative and owner)