It’s a great idea indeed! I previously used the app “Stache” (of d3i) to organize my bookmarks (Without them being stored/analyzed and sold to hundreds of third parties. They had a good privacy policy…), unfortunately the app has been discontinued…
I then turned to Notes in MacOS/iOS and even Pages/ Word (Yes yes…that many bookmarks 
) to weekly categorize bookmarks/URLs of my iDevices… 
Alas! Organization is good, following through is even better… I unfortunately never had (took) the time to clean up all those links…
I now hope that with Agenda, the ability to link “ To read -URLs from iPad” to a an event in Calendar (“Friday at 06:45 in the train during commute”) will make the daunting task easier… 
Of note: it is not necessary to copy/paste links, I just drag and drop links from Safari or Mail to a note in Agenda, it saves a lot of time and very often a good description is already associated to the URL.
I can’t wait for the optimalization of the tags management (Tags, People, Emoji's, Text Actions and Links - #16), especially for an “auto-completion” feature (I couldn’t find it anywhere, have I missed anything? 
)…
Keep up the good work! 
Laure