Edit: top context is “That is against AirBnB rules” and “refunded” i.e. AirBnB has explicit rules against surprise fees or bonds, and it can enforce rules.
I am guessing you just responded quickly but it is always good to spend time to try to “Please respond to the strongest plausible interpretation of what someone says, not a weaker one that's easier to criticize. Assume good faith.” - https://news.ycombinator.com/newsguidelines.html