That ’90s Show has a lot of similarities to That ’70s Show, but it breaks one of Hyde’s biggest rules for The Circle. One of the most memorable aspects of That ’70s Show is the use of The Circle, which was a clever way the show got around drug censorship on cable television. Although That ’90s Show is a Netflix original and thus has fewer restrictions on censorship, The Circle and its gags continue in That ’90s Show, although with some changes.

https://screenrant.com/that-90s-show-nate-nikki-hyde-circle-rules-break/