These three rooms are on the same network, call it Chico Network and each room is just skin. They share pools of players for the most part, but there are several games that are unique to each skin but mostly customer Betonline. This is a tournament not playing ring games, so I'm not sure how this setting is set.
There are many similar rooms with such a setup:
Pokerstars / FullTilt
PartyPoker / Bwin
Winning Poker Network (WPN) -Kameta American / Black Chip Poker
iPoker Network - William Hill / Betfair, etc. (there are many rooms in this)
The player may have only one account in Chico Network according to their conditions of service (had to close my account at Tiger Gaming same day when it opened as I was not aware at the time).
Cardschat But there freeroll of $ 200 on Friday SporstBettign Poker and $ 200 on Saturday Betonline, so they are predicted to have accounts in both skins. You can find all information about this topic ->
https://www.cardschat.com/forum/car...your-bol-sportsbetting-usernames-here-291541/