I was going to follow the International this year and then I completely forgot.
Also, I walked past an internet cafe in Singapore - 6 dudes in a row, 2 playing League, 2 next to them playing Dota 2, and the 2 next to those guys playing HoN. Nobody tried to kill each other. Mind=blown.
I just tried Dota 1 to play phoenix, I don't know how people could stand buying things in it.
They didn't really have a choice, I'm sure it was easy enough to remember once you were used to it.