The article compares UK and US online slot rules, including testing, payout...

https://www.bookmark-help.win/a-comparison-of-uk-and-us-online-slots-highlights-different-rules-and-access

The article compares UK and US online slot rules, including testing, payout information and state-by-state access. A 96.5% RTP is an example, not a promise of individual returns; legal options for online casino play vary widely across the US.