Sorry I wasn't more clear. To answer your question; in theory yes, some crooked software provider could do this by altering the odds of each play. But that is why we have testing and auditing done by 3rd parties.
There are evil software providers:
https://www.casinomeister.com/rogue-casinos/
You can see RTG, Micro, Rival, etc aren't on that list. The thing is, developing a casino software is something that requires a budget anywhere from high 7 digits to lower 8 digits. It takes YEARS before a casino software provides the owners with an ROI. This makes it so that software developers are GENERALLY in it for the long run, and as such, wouldn't allow their licensees to hurt their reputation. Remember, in most cases the software providers earn whether the casino does or doesn't make money.
It also doesn't make sense to believe respected software companies would do this. After all, if this conspiracy going on here were true; that all software providers, independent auditors and technical standard providers, all webmasters, promotions managers, casino managers, etc were in on this, then one casino or another would feel the competitive pressure and put out a 1000% bonus with 10x play on blackjack. But since any casino that puts out such a bonus would go broke (or are rogue and simply won't pay) since the software is fundamentally honest, then that should tell you something.
Also, if we were all in on this together, then someone would step forward no? I mean, we are a lot of people in this industry from all over the world and many with no direct ties to one another, many competing very heavily with each other (i.e. if RTG did it, Rival would point it out, if Rival did it, someone else would point it out, if one casino would do it, another would point it out, etc).
But then, if you really wanted to go off on conspiracies you could say Vegas casinos don't shuffle the cards, roulette wheels have stop buttons, dice are weighed in the casino's favor, etc. If you are going to go off into deep, totally unproven, baseless conspiracies, why stop online?
And if you believe in such conspiracies, then there is a simple solution: Don't gamble or don't gamble online, depending on what level of conspiracy you believe in.
Any business transaction implies a certain level of trust, whether it is buying a car, booking a flight, buying a 6 pack at the supermarket or gambling online or offline, there is trust involved. You trust providers and authorities to ensure you get a quality service and product. Without trust, business couldn't exist. Now does that mean that the trust is blind? Of course not, but at some level you must trust others and that is why reputation is important. No one can understand every last bit of modern life (i.e. how the aviation standards are ensured, how food standards, how cars are built, defects detected, etc, etc etc)
Hope that helps.
Kind Regards,
Nicolas Johnson
Bet Phoenix Casino Affiliates Manager