Although I agree a gobal feed sans spam at scale might be a bit unwieldy, you could still pull up new people from that to reach that scale. I think we’ve lost many early adopters who just stumbled upon in the switch to paid relays… them not seeing us with out a ton of spam, and us not seeing them through that ton of spam.
Discussion
In other words, spam isn’t the problem, the solution to spam is a problem for new user experience. Presumably a algo based solution would be client based. I think we are saying the same thing.