Hello Insightful Tiger. I do not have an answer. However, I can offer this link to the learning center for consideration.
Sharing from experience I discovered both of those moderated messages at least once or more. The picture pixelated can be discovered here at this link.
Once a picture I used was deemed pixalated due to the quality of the image. What was odd, is on a learning expedition I looked real hard at the image I was using. Even though I got it from reliable source, and I followed the attribution rules, and I relied on that sites rules, I discovered something. The pixelation was caused by a well hidden watermark. Apparently it had sneaked passed that sites moderation.
Regarding overly promotional I use to just count words thinking I had enough to put up Amazon Capsules and Ebay capsules. I am not an expert, yet what I gleaned from that experience was interesting. Even though I had a bunch of words they were not subject orientated to what was promoted with affiliate links.There is a minimum requirement.
Not sure if that helps or not. Also consider the 'what' of promotional. If one is promoting the website then the content is to be of the website. If one is promoting the item then the content is to be of the product.
And, welcome to Hubpages. Believe me hubpages does like you. If they didn't like you they would not have sent a message. Remember sometimes the source of moderation is not a set of human eyes. If after reviewing those links and there is still some unanswered questions drop them a line. 'Explain' why you believe you have complied. There really is only a few moderators, so allow for patience with receiving a response. And, remember the adage 'pay it forward' by helping them help you with information.
Remember, Insightful Tiger, I am not an expert other than from the experience I have encountered. I am curious about that phone program.