If anyone types something like 'jokerstars' or talks about the site being rigged, I get excited because it means I have spotted a fish. A fish who is paranoid and more likely to be on tilt and ready to give me his money.
The rake on all the decent poker sites is capped on each pot. So even if 10% of big pots were 'rigged' to produce more action it would not be a very good increase in profits, versus the risk.
When you have a poker site that ordinarily has over 100,000 players online simultaneously during most peak times, it makes no sense to try and cheat. If they are caught, they face a major and costly backlash.
On top of all that, it would take a serious conspiracy to make this happen. Programmers, management, staff, customer service people, you name it. At least a dozen or more staff who knew it was going on.
What are the odds that so many people would know about something like this and keep quiet? Slim to none.
Human nature is such that people will make a fuss about things like this. Either someone who feels it is their moral duty to expose a scam, or a disgruntled employee bent on revenge.
So I just don't accept that a major company like this, operated within the United Kingdom (they are on the Isle of Man), is going to writer software to stiff players, when they could simply offer a straight and legitimate game and still make a fortune.