Wow, that's a life changing message when they stand to what they think is right. Kudos to superbet.
I think this is a form of promotion to earn the trust of users.
Yeah, it's also part of their promotion and it's an investment for them at the same time, increasing the reputation they have for paying that much. 30M Euros is such a huge money so, basically this is an exposure for them and a publicity that will definitely attract more gamblers to them.