The Many Matters site is a container - a bucket, if you will - containing multiple “mini-sites”, or page-groups, each of them private, self-contained, and isolated from the others. There’s no limit to how many such “mini-sites” we can host.
To learn more about what a page-group on Many Matters can be, have, and do, take a look at the example group.
If you’d like your material to have some space on Many Matters, contact us. There are page-groups here that we’re hosting at no charge. Others may pay a fee, depending on how much space and time they require. Chances are, if this is a suitable space for you, we can arrive at terms that will make us both happy.