With SSPLv1, does that mean one can sell redis hosting as long as everything used to manage it is open source? It says it's based on AGPL. So if say digitalocean open sourced all their api's and UI they could still offer managed redis. It seems like the answer is yes but then the blog post also says

Under the new license, cloud service providers hosting Redis offerings will no longer be permitted to use the source code of Redis free of charge.

That sounds like no.