Nothing ever dies ... the temporary glory of a thing just fades away [from fanaticism and the fad just doesn't have the immediate (lemming) following it initially did). The "[i]immediate (lemming) following[/i]" could also be described as "pizzaz" or "glitter".
One should keep in mind for "Social" media that four rules are always applicable (at any given Human moment for any given Human reason: [list]
[*] I'm ok, you're ok
[*] I'm ok, you're not ok
[*]I'm not ok, you're ok
[*]I'm not ok, you're not ok
[/list] ... If it is what you do - do it well for you ...
Presently bookmarking may not have much scope when compare to previous days but its not dead. If you do bookmarking it will surely help you in increasing your page rank.
@ArushisinghFeb 11.2017 — #Early on in the linking days, the number of links mattered. Then, things evolved, and quality and authority were factored. I see the same thing happening here; I think some of the lower quality, semi-automated, mass bookmarks are losing value.
@MobilespyFeb 22.2017 — #Social bookmarking is a best way for site promotion as we do link building It will never die look here You may see serachenginejournal for watch some bookmarking sites
@Eric_DebbyFeb 23.2017 — #No social bookmarking is still the good technique to promote your content on the website and getting the traffic. But it is important that you choose the social bookmarking sites wisely i mean choose the sites with high rankings such as Alexa and DA.
@KentuckyMFeb 28.2017 — #Nope, I don't think Social Bookmarking is dead for SEO. If you do random social bookmarks for your website/blog then this will not help you. Rather if you can do high pr social bookmarking for your website/blog like-reddit, tumblr, digg this is much helpful.