~snip~
Livecasino.io and Bitcasino.io are owned by Moon Technologies B.V. Where Sportsbet.io is owned by mBet Solutions N.V. But, these three betting sites are operated by the same group (company). All these betting sites are founded by "Coingaming Group" which is known as "Yolo Group" now. There is another casino which belongs to Yolo Group, and the design of the casino is same like the other three sites.
You're right I have visited their website
https://yolo.com and they talk about another casino slots.io. I wasn't aware of it, and I had never read a comment here or on blogs about it. He has the same design as Bitcasino and I didn't find what it is offering on top of it.