The open graph only becomes usable when people can find relevant identities, posts, communities, events and services. Search and web-of-trust are therefore core product layers, not side features.
Why search is hard
Relays can be incomplete, offline, private, paid, spammed or specialized. A client that simply asks a random relay for everything may miss important context. Search services and indexers add structure on top of the relay layer.
Web of trust
Web-of-trust thinking asks who is known by whom, who is followed by trusted people, which identities have history and which signals appear coordinated. It can help filter spam and surface credible people without giving one company total control.
Crays demand graph
Crays can treat search and trust as demand infrastructure. The question is not only who posted. It is who can bring guests, who buys access, who attends venues, who votes, who earns status and who creates repeated commercial signal.