If he is actually somehow related to the casino and its team and is only here to promote the casino this way, it would probably be better for the team to properly announce the platform in the forum and they could possibly get a lot of active users from here.
I believe this website is clearly a scam website because someone already said he try the website with just 10$ and won over 2k$ but when he try to withdraw it they ask to deposit another 500$
many of these scams happen in 2018 and you can see them here
New scam schema on the forum - Free Money To Test Casinos.
It seems like lots of players have fallen for this scam site already. I guess Op is just hyping it to attract more players. I hope more victims of this site would speak for themselves to warn others about it. The site seems suspicious and there were obviously existing red flags. Players should really be skeptical even if there would be winning stories that they could read because fake testimonies are everywhere.