Yes, big museums in big cities that are major tourist attractions are raising their ticket prices. But that's because they are the only museums that can count on ticket sales as a major source of income.
https://www.nytimes.com/2023/08/01/arts/design/museums-raise-admission-fees-guggenheim.html
The average museum makes 5 - 10 percent of the dollars it takes in from ticket sales.
https://www.artnews.com/art-news/news/united-states-art-museum-financing-1234584930/
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