I've used various bookmarking / annotation services for the past 7-8 years, some as bookmarklets, others as extensions. None of them ever evolved into a great c

I've used various bookmarking / annotation services for the past 7-8 years, some as bookmarklets, others as extensions. None of them ever evolved into a great community. What's different about this one ? It looks like an MVP but without a mention of how it stands out. Here are a few from the endless list ... https://www.diigo.com/ https://www.diigo.com/ https://hypothes.is/ https://hypothes.is/ http://annotateit.org/ http://annotateit.org/ https://annotary.com/ https://annotary.com/ https://www.scrible.com/ https://www.scrible.com/ http://genius.com/web-annotator http://genius.com/web-annotator