Nah, that's a bug, not a feature. I'm not putting this much effort into my writing to have it seen by 3 npubs in Paderborn.
Discussion
who submits to goog crawler? or how does google spider crawls relay content?
It doesn't crawl relays, but it can crawl webpages that display notes.
But anyone can setup a relay and aggregate notes from other (readable) relays and publish them to webpages that are indexed.