In the state of Florida, the state pays for the AP exams, not the district. The state also gives each district additional funding for AP classes (as well as IB and AICE), and pays a bonus to AP teachers, based on their students scores on the AP exam.
With the state investing a large amount of $ into AP programs, it also insures that the public universities will give credit for these classes (based on the test score).
With that being said, I didn’t even know there was an “AP Seminar”. I don’t think UF gives credit for it. The other schools may give 3 “generic” credits, but those credits would not count toward any college/state requirements, other than the “number of credits” to earn a BS. Fairly useless.
https://archive.catalog.ufl.edu/ugrad/1516/advising/info/AP-examination-credit-info.aspx