Yes, of course they are and this is the whole point.
This is my private network and these bookmarks/links will be there forever.
Unlike all other social bookmarking sites or tools submitting to them, where more than 95% of your bookmarks and accounts will be deleted.
Also because this is a private network and not publicly available, these SB sites will never get spammed like the rest of the free to submit SB sites, so the bookmarks/backlinks from them are even more powerful,
plus many more benefits you can read from the tools description...