Okay I've got a client who uses auctioned domain for his money site, but now he is insisting on getting HTTPS installed albeit I've explained him that it still can rank and showed him some examples. I use HTTPS for brand new sites, but for auctioned/expired, I really don't, especially if the already-backlinks are pointed to HTTP. Not that I don't know how to redirect (as it should redirect them automatically if properly configured). My question... what do you think? Should HTTPS matter? Anyone lost traffic when switching?