If you're a freelancer you're always "seeking work", even when you have a good amount of work currently it never hurts to have more :)

If you look closely, you might notice that most of them don't have a broad range of technologies in their experience. Probably that limits their flexibility in terms of employment. At least that's my suggestion. For example, quite a few python/django devs seeking for work and no offers for said technologies.

Most people are seeking remote work. Also, lots of people outside US.