Mostly to learn of new techniques, systems, and read analysis on the industry. There's always something to learn, even if most of it doesn't provide a quantifiable edge.
I agree with this statement and I'd like to add that even if a strategy is not a solution in its self, it could "move" your perception, inspire you, give you the motivation, which at the end would make you create your own successful solution.
The source of inspiration and motivation doesn't have to be necessarily another strategy/method/system, but even something as simple as a quote.
On the top of these, also I got in contact with programmers such as Victor, the global administrator, who except his programming skills, he is also a very nice person!
A win-win situation!!