Stake Casino has similar features. When you go to your profile on the casino, you will see an option that says “statistics”. If you click on it, they will show you a rough preview of your recent history, both total lost and total winning. If you request the file, it will be sent to your email with a total breakdown of each of your recent games, amount wagered, profit and loss made on each game and overall rating for that period.

Yes, I also didn’t understand what the OP was missing, since most casinos already have this function implemented. Furthermore, even if there's no detailed betting statistics option, there's always, absolutely always, the option to view your deposit and withdrawal history - all you need to analyze the profitability or unprofitability of gambling. I can't imagine a service where these statistics would not be displayed, since both parties are interested in it for obvious reasons.