Why do people use Spurl?

My take on this (also as a non-spurl user) is that it’s full-text search.
I built my own single-user bookmarking tool a few years ago, and my main way of navigating through it is full-text search. I occasionally think about exporting all my bookmarks to delicious, but the lack of search stops me — I guess I’d have to run them in parallel.
By some weird coincidence I happened to have Social Bookmarking Tools (in which you are credited as a reviewer) open in a tab, ready to read, when I saw this post. Now I just have to read it, rather than skimming it to compare features :-).

I use it for two reasons:
1) It saves a copy of the page for later use if the real page goes away.
2) It has a bookmarklet that simultaneously posts to my delicious links – since I find delicious a quicker way to actually view/search my links.
So, essentially, Spurl is just an archiving tool for me.

I’m with everyone else on the fact that it saves pages, so no dead links. Also when you search all the text on the page is searched, not just the tags and text that you decide to save it as. I used to use del.icio.us but I always found it hard to anticipate what I would be searching for later when labeling a page. Using the spurl search is like doing a google search of my saved pages.
Along with KO if I was starting again I would use ma.gnolia.

Seems like the people whom I have been asking what their favorite service is and why have three criteria: 1) features (saving pages, easy to understand RSS, share a link with people or a group); 2) ease of use (usable interface, simple, presentation meets expectations); 3) where their friends and peers are hanging out (this gets to who is using the service and sharing things tagged with my vocabulary and my interests as well as my friends are using the service and that adds value).
My favorite is MyWeb 2, mostly because there are enough people with similar interests in my community that use a similar vocabulary. This is insanely valuable to me as I often do not tag an item with a term I would normally use, when I use MyWeb 2 others in my community have more than likely not only bookmarked it but tagged it with a tag that I forgot to add (but is the term I am using to refind that information).
Others use the community has a human filter on the flood of information. It is often not what is popular that is important, but what falls through the cracks that is of interest an has value. Tools like Digg and other popular filtering tools, may not fit my taste or information needs. But a good community of similar interests, particularly in a niche, that finds things that I should be seeing (not that my community knows that) and it not on the radar or in the tag cloud (there is rarely anything I am ever seeking that I have found through using a tag cloud). I like the tools that help surface things out of the community with out it being a self selecting group (the groups start out well, but often dilute into groups that do not match the level of items I am seeking. I really like the MyWeb 2 community approach as it filters things fairly well (I really really need to be able to manage the edges of people in my community (give me everything person X bookmarks except these 6 tags or show me only these 14 tags from person Z) as I really do not care to have the CNN homepage or AOL homepage come through again).

I really like the idea of MyWeb, but – like so many of these things – it suffers from the street performer problem: without a crowd there’s no show. Part of what makes del.icio.us and Flickr so attractive is that they deliver value for user #1, which makes them a good tool for users who can’t or don’t want to do the whole ‘social’ thing as well as those that hunt in packs. Besides, when MyWeb came out I was already using del.icio.us, which didn’t do all that MyWeb offered but did seem to do all tht MyWeb actualy did, so I couldn’t be bothered switching.
And then there’s the whole anti-corporate thing, which led me subsequently to jump ship from del.icio.us to Simpy.
I’ve tried Ma.gnolia, but I found it ridiculously under-featured. Specifically, it didn’t seem to enable tag-based bulk-editing, either to delete a given tag or to delete all bookmarks tagged with it. (I was particularly annoyed with this because I’d followed the suggestion of importing all your Firefox bookmarks with a ‘firefox’ tag.) Also the interface isn’t as clean as del.icio.us or Simpy: they seem to be trying to make it manageable by limiting the amount of information displayed, whereas the great discovery of del.icio.us is that even an apparently boundless profusion of information can be made manageable by tagging and ranking.