I think one of the reasons why people seem to participate in Q/A activities more is that this can be a good way how to get some exposure or find some interesting people to follow.
You post a question - someone responds in such a delightful way that you just MUST know more about this person. So you look into their profile, possibly browse through their hubs, and maybe even send them some comments or start to follow them, if you like their writing. And it all started just by you asking a question. :)
(Just a note - this was NOT meant as begging for pageviews, tehee!)