How does/will subscription work with sub~s? How do you think it should work?

Currently, I am e.g. subscribed to ~tildes.official and ~tildes. That gives me a number of questions:

• if you subscribe to a tilde, do automatically you see content from sub-tildes?
• if you subscribe to a tilde and a sub-tilde, does it have any effect? Intuitively, I'd expect the subtildes content to be shown more, even if it's not as highly voted.
• What about a reverse-subscription/blacklist?

Just some thoughts, I'm curious what the status quo is and what you people think might make sense.