I posted a few hours ago a question about how to promote another math site which has different purposes. I really, really have no intention to spam, but I thought (and still think) that the resource I wanted to promote could be useful to users of math.stackexchange. My question was if some kind of endorsement from math.stackexchange could be possible, and "no" would have been a perfectly legitimate answer.
However, my question is now disappeared, so I guess it has been closed as spam. I don't think that there could be anything wrong with my question: for instance an analogous question on meta.mathoverflow has long been discussed and people have tried to spread the word. I guess that the difference in response stems from the fact that I have a high reputation on mathoverflow, hence people there are unlikely to treat me as a spammer.
A meta.meta.mathoverflow not existing, I ask my new question here. Why was my previous question removed? Is there a way to ask it in such a way to make it acceptable? I'd be particularly interested in hearing comments from the people who removed it, since we did not have the possibility to discuss and probably I have given the wrong impression.