First, I would like to know - are there any authoritative studies on this topic?
I use statista before on finding analytics on various topic. Although they are not official but you can use their stats as reference
https://www.statista.com/outlook/amo/gambling/sports-betting/worldwideDo bookmakers or prediction platforms themselves publish statistics on the percentage of profitable players in relation to all other players? Does this information differ between different sources? Is there a difference in long-term profitable players in bookmakers and on prediction platforms?
I have come across different numbers. Some argue that only 1% of players are profitable in the long term. Others say that less than 1%. Still others claim that the number of such players is 0.01%.
I doubt casino will publish stats like this or at least be transparent on the stats because it surely shows a very small number of winner which is proven on the revenue they are generating per year.
Casino is thriving because there’s a lot of losers gambler. They only share occasional big win from players but they don’t release full stats.