People will tell you to read the rules. That might not always help as they might not be specific enough for yor particular questions. I personally suggest e-mailing them a link to your unpublished hub. Ask them for feedback.
I was told there is a new software program that will automatically shut down all advertising on your hubs if it picks up specific words. Which basically means if you are more concerned about making money than you are staying true to your vision then all you will have to do is either change certain words or spell them incorrectly. If you care about your artistic vision more than making money then you will simply have to shut off the ads yourself.
E-mail HP and see what they say. It doesn't matter what the rules say. it doesn't matter what anyone here says. You need to ask the people who have the power to take down your hubs.