The margins on even the most successful mobile games are surprisingly small. Once you take into account the cost of running the servers, code maintenance, customer service, platform fees and advertising the roi will typically be less than 10%… if you’re lucky.
This always happens. The first pre-release screenshots are the ones with the most views so tend to appear at the top of Google searches. Guaranteeing them to be used in most news stories for years to come. Which gives them more views. Which gives them a higher Google rank. Etc…