Excellent points about E2E, which I see as complementary to the the ideas of Freedom of Impression that we have spoken about.

Perhaps it might be useful to think of "reach" as a broad term that needs modifiers to indicate the "contract" between speaker and listener, and especially whether it is demanded, allowed or undesired by the listener.

For example, mutually agreed reach:

• Permissioned reach: allowed by the listener.
• Subscribed reach: requested by the listener.

And less mutually agreed:

• Purchased reach: advertising that should be subject to limits and prioritization
• Earned reach / organic reach: that gains priority from relevance and reputation
• Forced reach: forms of reach that abuse our freedom of impression.

This might work well with choices to selectively view feed subsets that are subscribed (always delivered), permissioned (delivered subject to user controlled filters with high priority), earned (subject to user controlled filters with moderate-low priority), and forced (seen only in a “spam/junk” feed)