I can't think of a single application where they inform the gambler of their past performance.
It may be "bad for business" to confront the gambler with an accurate statement of their position, but it seems like the decent thing to do.
I'd rather the player know the truth about their losses rather than lie to themselves that they are "about even". Then they can make an informed decision about whether to keep playing or not.
The tricks used by casinos to keep players playing seem shady to me. I'd rather give them the facts and let them make up their own mind.
How about the best of both worlds. Have a total profit/loss column alongside a session profit/loss (that may or may not be resettable).