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Here are a few recent articles about FICO increasing the cost of scores they provide to lenders. Some of these specifically mention mortgage scores and it's not really clear if other scores are affected. The last one is subscriber only but you can read the first few paragraphs.
https://www.housingwire.com/articles/mortgage-credit-score-prices-predicted-to-rise-2025/
Sounds like there's not much competition, so they can pretty much raise prices without losing much business:
The report cited FICO’s dominant market position, which covers more than 95% of securitizations
Lack of competition has certainly helped their stock go up 4x in 2 years.