HBO is actually the longest running subscription television service.
What popular TV shows does HBO produce?
Im not sure, but they have over 2 million subscribers
How much does the subscription cost on a monthly basis?
Im not sure, but HBO's income is about 1.93 billion.
Who is the CEO of  HBO?
Not sure, but it is owned by Time Warner.
Doesn't HBO run the Game of Thrones series?
Yes, though programming is mainly theatrically released movies.