What the OP said and the explanations he gave do not necessarily mean that the casinos on the second list are manipulating game results (scamming their users). But, if true, it clearly mean that those in-house games are not provably fair as advertised.
Contacting customer support, especially via live chat, and asking for clarification regarding such issues is a waste of time as most agents do not have the necessary technical knowledge to address these concerns or provide accurate and satisfying answers.
This topic would be more complete if OP can add some proof to back up his claims.
Accusing or making up some words in saying this and that in regarding about having that potential rigging up their games but cant be able to prove out some solid proof then its just that simply stating his idea but still people wont be that believing considering that those casinos mentioned on OP are known. Provably fair, yes we are that minding of these things because we do want that in every bet we can surely say that everything is fair and there's no rigging involved but it doesnt mean that those others who doesnt have means they are not fair. Come to think that everything would be still become a loser in the end of the line, house do always win at the end and thats why im not minding that much as long im sticking or playing on a known and credible casinos then this whats important.
