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An Australian casino player is taking Royal Caribbean to court, arguing that the company banned him from sailing with its services and from playing at its casinos over his ability to count cards. After previously winning a legal battle against Star Casino, Mark Timothy Grant is now moving to confront the cruise line. 

Grant argues that he has booked five Royal Caribbean cruises that were valued at a total of AUD 22,000. He booked the cruises with money he won playing at the Royal Caribbean’s ships’ casinos. 

However, before he could even board the first cruise, Grant was told that he would not be able to proceed onboard. Grant had his son and partner along with him. The company only then went to inform Grant that he had been placed on a “no sail” list, effectively a ban, because of “breaking the house rules” in the casino.

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The company has also pursued partnerships outside the normal financial media. Its deals include relationships with major sports organizations and entertainment properties, signaling efforts to integrate prediction markets into mainstream content and information services. 

The conclusion of the Yahoo Finance deal comes as there is more talk about the use of prediction market data in journalism. Operators such as Polymarket and rival Kalshi have touted their markets as a way to get real-time information on how likely future events are to occur. 

However, some media industry observers have questioned whether trading activity can reliably stand in for broader public opinion. There are also concerns among critics over the growing links between news organizations and prediction platforms. 

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Americans wagered nearly $167 billion on sports in 2025 through regulated sportsbooks, an 11% increase year-over-year, according to data from the American Gaming Association (AGA).

The blurring line between financial investing and gambling has been accelerated by the rise of prediction markets—exchanges offering event contracts that are federally regulated as financial derivatives. U.S. News found that over 40% of active sports bettors now also participate in sports prediction markets.

Financial advisors continue to urge consumers to view sports wagering strictly as entertainment and to only risk funds they can afford to lose.