Download DotA 6.81d
There are still players interested in the classic DotA, even though with the success of League of Legends and even DotA 2, still playing DotA 1 seems weird.
But to answer the question, Some players don’t like the graphic style from League of Legends and neither from DotA 2, that’s why they are sticking with the classic DotA.
Things might change with the release of Heroes of the Storm, a game developed by Blizzard that could bring the same old feeling of the classic DotA.
The latest map is named 6.81d, you can download it from here.
The map didn’t evolved too much. Icefrog (the developer), managed to add just a few new heroes and items during the last two years. And tweak the stats and abilities of the current heroes.
Garena doesn’t support DotA anymore but there are many other places where the classic DotA can be played.