I don't understand how come hubpages won't tell you the reason why.
I never had a hub banned but I do have a hub where hubpages won't allow any advertising on it because it has very disturbing pictures of dead people in it. The hub has a dollar sign with a slash across it. Hubpages told me why they did it.
It's about the border drug wars on Mexico & US and it was too gruesome for advertising so hubpages won't allow any ads on it.