Tier 3 produces redundancy as a structural byproduct of use

Tier 3 distributes data as a structural byproduct of participation across a protocol that requires no organization to operate and produces redundancy at every point of use. The architectural pattern is visible in the longest-running information systems on the open Internet:

• DNS has resolved domain names for 43 years, handling trillions of queries per day across 350 million registered domains, and has never gone down globally (S-0016).
• Email has operated for 44 years, serves 4.73 billion users, and carries 392.5 billion messages per day across infrastructure no single entity owns (S-0017, S-0018).
• BitTorrent has operated for 25 years with over 2 billion cumulative installations; the Internet Archive uses it as the fastest method to retrieve content from over a million Archive items (S-0019, S-0020).
• Git has operated for 21 years, is used by 93.87% of professional developers, and maintains complete repository history in every clone (S-0021, S-0022).

These systems share structural properties that differ from Tier 2 in kind rather than in degree. Redundancy is not maintained by organizational agreement; it is produced by participation. Integrity is not asserted by the host; it is verifiable by cryptographic inspection. Governance failures do not terminate the copies; the copies persist on every node that participated. Scale is not limited by coordination overhead; it grows with each additional user.

In fact, Tier 3 is anti-fragile in a sense Tier 2 is not: the more it is used, the more redundant it becomes, and the cost per dataset of additional redundancy goes down. The economic and organizational properties this produces are why DNS, email, BitTorrent, and Git survived where comparable centrally-coordinated alternatives did not.