The cost of hosting a website or application can vary depending on several factors, including the amount of traffic the website receives, the amount of storage, compute power, type of hosting(shared, dedicated, VPS, etc), bandwidth required, and the level of security and support needed. Therefore, it is not always the case that a high traffic website will necessarily have a higher hosting cost.
Additionally, the profitability of a hosting service depends on the specific business model and pricing strategy of the company providing the service. Therefore, it is difficult to provide a general answer to the question of profitability without more information about the specific company and its operations.