I just spoke with a member of their customer support team regarding this as I was curios as well. They said they removed the profit/loss information because the stats were not accurate according to him. Data such as rakeback and race wins wasn't reflected apparently. He also said players can contact the support anytime they want to view their records. Not the optimal solution, but that's how it is now.
Did you asked if they plan to fix the issue and bring that feature back? It would be a waste of time for both players and support in the long run if this isn't fixed.
Their response to personally contact them as a temporary solution looks good but it looks like they actually don't have the correct data judging from Cryptobillionaire's comment
https://bitcointalk.org/index.php?topic=5285404.msg55483944#msg55483944 [see screenshots]
..... I'm sure they have a reason why they hide the stats. You can ask their customer support or one of their team member why the stats is hidden.
Read Pmalek's comment above.