The question I have in mind is, aren't the developers the ones that should be responsible for any manipulation in the games or it's still possible for the casino team and members to manipulate the game engines?
Some people still think that games on online casinos are from the casino teams themselves but those games are from software providers, is this valid or not.
For me I trust that the providers use their own servers and they link them to the casino where they set the house edge from what the casino asks them to be.Some of these providers offers adjustable RTP meaning is not a fixed house edge but a volatile one and it depends then from the casino which RTP they throw in in their site.This is what the casino can manipulate and for this we have no control over,we only play in trusted and reputable casinos who most likely they don't need to change the RTP as they are huge and they make profit also with lower RTP-s.