Other than not providing healthcare? Multiple of them have been sued or faced Federal Charges.
https://apnews.com/general-news-c0fb19ca6e41519f532f0cd19981817d
https://www.kcur.org/health/2020-04-16/health-care-sharing-ministry-sold-bogus-products-to-missouri-customers-lawsuit-says
https://chir.georgetown.edu/health-care-sharing-ministry-data-point-to-problems-for-consumers-regulators/