A good question, and one that Loki does not answer right away. Taking a moment to think about how to answer, to put it in words, the 'why'. "I suppose because I was treated with kindness when I first arrived. And have been treated with kindness since--when I am not accustomed to being treated with such that is freely given." A bit more thought out than most might suspect from him.

Then he's smiling with a small laugh. "That it allows me to meet people and see who has come and might be trouble or not, is also a benefit. Should someone also feel indebted to me for the information, that's no bad thing as well." As usual with Loki, there were multiple angles.