Thanks for the review!
About the descriptions: these aren't articles or "content", just short site descriptions for bookmarking. Most social sites have restrictions and you couldn't use a 400 word "article" there. The optimal description length is 2-4 sentences.
The price is $5, because we spin the descriptions manually. We do this by writing multiple variations of every sentence and then going through words/phrases and adding in synonyms. This is pretty time consuming and because we don't use any auto spin features (most other providers simply hit auto spin), we charge $5 for this.
Original (not scraped), nested spintax descriptions are really time consuming to make. We actually prefer orders with ready made descriptions, but many clients don't want to do any spinning themselves.
Social bookmarks are not really meant for in-content links, hence all we do is make sure that the descriptions are readable (not auto spun) and reasonably unique.
Again, I've used all other social bookmarking providers on WF on my own sites and I can say that we have no plans to change anything in this regard. What you get with others is either an auto-spun description which makes no sense, a unique scraped description that is completely off topic or a longer paragraph that's only been word spun to 5-10% uniqueness.
Thanks again for your review and let me know if you have any other questions or concerns!
edit: as you've already mentioned - descriptions are optional. You can always write and spin (preferably, but up to you) a description yourself!