I think sometimes the creator doesn't want to respond to a post. And sometimes you might not see the response from the creator if the creator responds via pm. Just spitballing here.Don't know if this has been brought up but I see a ton of ads that are responded to and then no response from the creator (Jesus is like that).
It's pretty comical at times.
Anyway, ye fecking dolts, if you're the creator, "watch" your ads.. you will be notified of any activity in your ad.
If you're responding to an ad, don't assume the creator watches his ads so hit the "quote" button to give your response context and it notifies the creator that you have responded to his ad.
You should also actually private message the creator as I feel those hold more weight would push come to shove in some instances.