It's up to the moderation team, of course, and I am aware that Airbnb is a YC company, but I think there is wisdom in the policy of some other online communities to be wary of submissions that are basically political campaigning. On my part, I'm not going to be signing any petitions on behalf of Airbnb (a company whose services I have never used), and I generally don't lobby on behalf of for-profit businesses, expecting them to thrive or fail based on how they serve their customers.