Ehh, I doubt the members are real. If it is a scam I wouldn't be surprised if all the "participants" are just bots. You can do whatever but I'd prefer to let it pass and put my energy towards my game development :P
(Insert shameless plug for Hex-a-Decimal here. Also if you want to chat with me you can find my Discord server in the Hex-a-Decimal game page and find my Discord)