I think that, sooner or later, someone would do it. I don’t mean Symbio working like agency, with % for admin etc, but something that we could call “Symbiostock Farm”. It could be hosting dedicated only to Symbiostock. Registration, payment, and you have your own subdomain with Symbio site ready for uploading. All you pay for would be:
– server space for your files,
– script mainstained and upgraded by admin,
– help, support, backup,
– your subdomain.maindomain.com or/and maindomain.com/subdomain,
– indexing and promotion in main search engine at maindomain.com.