How and why do you go looking for old questions on fluther?

Another question just asked if people went back to old questions and gave out GQs and GAs. A number of people said they did and I wondered how this happened. What would cause you to look for or through old questions? How would you design your search? Why would you be doing this?

I have occasionally received a new answer on a very old question, but so far, it has generally been new people. I assume they are just surfing through, searching on one topic or another. Maybe even just checking out my questions.

However, I did not realize this was a regular practice for some people. So I’m wondering what’s behind it.