Earlier quoted context omitted.
> Every single one of them oversells their capacity That sounds like their problem, not ours
In theory yes, but the overselling does also keep the price low (at least a bit), but also boosts revenue. So when power users use the service too much, the seller will either raise prices, cut features or ban some usage patterns. You can vote with your wallet though. So don’t throw money at them or just deal with it. Plain and simple.
If they they expect X money for Y tokens, better provide Y tokens for your X money. If they can't provide that, then change the pricing plans. That's not the users problem.