This is still in its infancy here, but I have switched my Q&A to my sub-domain. This allowed me to delete a couple of questions I had made which so far had received only short answers and which had been answered a couple of times quite negatively. Originally, I simply deleted the nasty-toned comments, but that simply hid them from other people's views, not mine.
You can also delete questions and later resubmit them -unsure how later-that had errors in them. This happens sometimes because of the limit of characters we have: So often I have written a question that was missing a letter or I hit the letter beside the one I wanted-quite possible when you type with one hand. The question is posted and yo can't fix it-well, now you can.
We will see if anyone clicks on ads from outside HP. That is the idea. It is unclear how Google will read these sub-domains all coming at once.