My guess is you're probably right!
Some people may also be hoping you will click on their profile, read one of their related hubs, and leave a comment...etc
This is especially true when you see someone ask multiple questions within a short time period and they aren't even listed as a "follower" for their own questions!
In other instances the asker may not agree with any of the answers they've gotten! A few have been known to remove their question if they've gotten answers they would rather not have others read to a question they posted...etc