I've noticed some neighbors who don't seem to be building anything or will have an item under construction for a long time, make parts requests on almost a daily basis. Some have been requesting for as long as I can remember, they don't seem to be building anything and just keep making the requests.

First, what do you suppose they are doing this for and second, how do they keep making requests everyday. Some of them don't have visible items being built on the farm.

Also when I make requests, I am no longer able to keep making them once I get all the parts so how do these people keep making requests everyday?