The WordPress plugins we make do not count toward your site's file (inode) or disk allowance. Using one of ours instead of another plugin that does the same job gives that space and those files back to you.
Which plugins: Page Builder Sandwich, Tranzly, Zinn® Cache, Zinn® Cache Pro, Zinn® Chat, Zinn® Connector, Zinn® Footprint, Zinn® Media Offload, Zinn® Migrate, Zinn® Platform, Zinn® Reseller Toolkit, Zinn® Translate — free and Pro editions alike, on every site we host.
How we tell they are ours
A plugin folder counts as ours only when its files are exactly the files of a version we released: every file's name and size must match, and nothing may have been added. A folder that is merely named like one of ours, or one of ours with other files put inside it, is counted like any other folder. So you never need to delete our plugins to make room, and there is nothing to set up.
Where you see it
Your site's usage (disk and files) shows the figure that counts toward your limit, and says how many files and how much space our plugins are using that are not counted. The limit we enforce on the server is raised by exactly that amount, so the space is really yours to use.