That's true. But if their prices rise to the point they are too close to the big 4, I'm jumping ship. I'll pay extra to have more alternative flight options without stupid long layovers during IRROPS.
Obviously, Frontier has to raise prices. Even before fuel prices skyrocketed, they were losing money. I still think their current business model is fundamentally flawed, but time will tell. We won't really know until the fuel emergency is over. Personally, I would be planning a new strategy. Not sure if it would work, but I'd try being a smaller low cost carrier that didn't suck. I'd charge a reasonable price for carry-ons (Ryanair tends to charge me about $20), offer reasonable refundability (future travel credit), better customer service, and see if customers might LIKE to do business with you. Not sure they could do that, now, but it's probably better than the current failing business model.