I think you're describing a gross deposit limit (deposits ignoring withdrawals) here - which exist in tandem with net deposit limits (deposits minus withdrawals).
I have been hearing a lot more grumbling about secondary limits of late - which to clarify are:
- spend limits - amount wagered, ignoring all other variables
- loss limits - amount wagered minus amount returned (ignoring deposits and withdrawals)
As loss limits can be automatically set by the casino and often non-obvious (either not disclosed or not highlighted to the player), they can cause some weird interactions:
- a player is allowed to deposit more than they can wager (e.g. a £200 monthly deposit limit vs a £100 monthly loss limit), and isn't disclosed until after they have deposited (i.e. when they hit the loss limit)
- a player is restricted from bigger sessions after winning (e.g. a £100 daily loss limit - so if they win £1000 on Friday, this is ignored on Saturday)
Limits are important, similarly they need to be clear and accurate - some of the incoming implementations are akin to headless chickens! I avoid session limits like the plague because so many sites can't calculate it correctly (one informing me I've been logged in for a month despite logging in and out daily), and similarly some can't calculate profit and loss either - in one case the claimed P&L for the past 30 days was wrong by more than £100!
Particularly important when these triggers are being used to assert risk profiles, which can not only reduce limits, but can opt you out of promotions (and in the worst case, unregister you from prizes you'd already qualified for!)