They probably saw what HBOGO was doing and got greedy. Only HBO has their own great content and IP in addition to movies. The smart companies like AMC are actually starting to make their own as well so they become a destination. I'd love to just subscribe to HBOGO for my $15 rather than cox so HBO has cable companies firmly in check.

Netflix, and even companies like STARZ, may have issue when internet TVs take over completely and all studios/channels can easily setup their own 'channel' to stream content rather than having to join services that have a foothold on consoles, devices and TVs currently. The middle man is getting worked out of many markets. Why wouldn't the movie companies that license to STARZ want to collect from all that content? STARZ may just have killed themselves off.

Hbo is owned by time warner, a cable company.

Time Warner and Time Warner Cable are now two independent companies. So, HBO isn't owned by a cable company, but they owe a major share of their revenues to the cable companies. HBO doesn't offer a stand alone internet service probably because they don't want to upset existing relationships with cable providers.