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

https://kilo-wiki.win/index.php/Are_UK_RTP_Numbers_Real_or_Just_Marketing%3F

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.