I haven't experienced that when dealing with any major US airline/hotel/car rental brand. They all have their own websites.
If not, I can usually email the merchant and work something out that avoids them paying a middleman. With one merchant in a developing country, I even hashed it out over WhatsApp! But I always like to communicate directly with the person or organization providing me the product or service.
If not, I can usually email the merchant and work something out that avoids them paying a middleman. With one merchant in a developing country, I even hashed it out over WhatsApp! But I always like to communicate directly with the person or organization providing me the product or service.