Is the Hub worth keeping? Look at the stats. Is it long enough to attract Google traffic? I have found anything less than about 900 words is very slow to get found by Google. I had one, nearly the first I wrote, that only got a few hits. I gradually added to it, and improved it. It still isn't a big draw, but it has gradually started bringing in hits, more than a year after first posted.
Keep playing with it. If it is a good Hub it is worth it even if it takes a awhile to get found.