This kind of thing is bad for business. Players get rattled by these sudden decisions, and may not now feel comfortable carrying on after the second email in case they wake up the next day and find SKY have changed their minds yet again.
They also lied to players, the first email claims it was their own review of operations, yet the second makes it clear it was down to the IOM regulators. It makes it looks like this is a company that doesn't know it's arse from it's elbow, another thing that is bad for business.
The world is full of players that have had "overnight shut downs" pulled on them, blocking them from completing promos and tournaments they have paid to enter, and often from withdrawing their money in the usual manner. Often they are assured the day before that what they might have heard about an impending shut down is mere rumour, nothing to worry about.
Perhaps the second email was also an attempt to pass the blame to the IOM gambling commission for what happened, as it would look even worse if this whole thing was an internal U-turn after a mere 9 hours.