Wondering why you still need a cable TV package to subscribe to HBO in the US? Because HBO is making truckloads of cash keeping things the way they are, even though that might not last forever. Its parent company Time Warner announced financial results for the year, and for the first time in years, it included some details about HBO’s business. HBO alone pulled in $1.3 billion in the last three months of 2013, and $4.9 billion for the entire year.