I was curious so I looked it up. This site seems to have some technical details: > Some slot machines operate on downloadable software, which comes from a cent

I was curious so I looked it up. This site seems to have some technical details: > Some slot machines operate on downloadable software, which comes from a central server. In these cases, the casino doesn’t have to open a game and change a chip. > Instead, they can simply download the software to alter RTP. But just as with replacing an EPROM chip, casinos need to follow their jurisdiction’s guidelines when changing server-based payout percentages. From https://www.gamblingsites.net/blog/inside-the-myth-that-casinos-can-change-slots-rtp-at-will/ https://www.gamblingsites.net/blog/inside-the-myth-that-casi...