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Hey there, I don't think it's necessary to 301 redirect the article, otherwise you might lose rankings. Just insert some compelling CTA and internal links into the content to drive traffic to the conversion page. When you are already #1 with the sub-page, there's is a big traffic potential and therefore you don't want to risk the rankings. Hope it helps a bit. Cheers, Martin

Hey there, the sooner you'll redirect HTTP to HTTPS the better. You are going to have more backlinks and rankings in time so it would be definitely harder in the future. Also, try to convince the 6 websites which already point to HTTP to change their links to HTTPS. And then, of course, redirect each page individually, as you said. Hope it helps, Martin