Frankly, I have no idea why it's not being served over HTTP (there must be a technical reason, Wladimir is a HTTPS zealot), and I'm not sure why the corrections URL is not configurable. I bet we discussed that in the blog or the forum, but unfortunately the site's down right now :(

As for correcting URLs that do exist, I think the idea was to avoid phishing sites and parking sites. But IIRC we did have a considerable number of false positives, so it's a questionable approach.

I'll argue for removing it from ABP now. URL Fixer is from us as well (it's the same code we have in ABP), so anyone who liked it can just install that. I'd rather have ABP do one thing, and do it well, feature creep is a thing...

Edit: It's decided, we'll remove the feature.