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+1 for #8 Alright, I'm going to jump on the bandwagon. Yes, it is a complete waste of linkbuilding efficiency to throw links at Tier 1 links that are gone.
But I'm going to emphasize something here. Some of those links that turn up red when you re-verify are not always gone. Sometimes there's just a website delay, or a server issue, or a proxy hiccup (same thing happens with Scrapebox).
It's not a big deal, but about one or two out of 10 are really not gone, just so you know. And I know that because I checked this issue manually on multiple occasions.