Last time it was posted, it was noted that utterances breaks GitHub's ToS in pretty much every way, and they could pull the plug on this really fast.
Can you clarify this? When you said this I assumed it was allowing internet random's to post to GitHub under a single account owned by the site or the project, and I totally get why GitHub is going to pull that ASAP (have seen that and got in rows over that before). But I just checked and it looks like you have to authorise the app and hence Utterances is posting under your GitHub account?