I'd rather see smaller lesser known crates which many may find useful.
That was the idea. However, the goal is to provide value to the community, and I am with those who think advertising serde will very much do so, given that serialization is something a lot of programs can use. I also think ansi_term is a fairly specific crate restricted to applications that require colored terminal output. Advertising it will also provide value to the community, but only to the fraction of it that has this specific use case.
Still, your suggestion also provided value to at least 19 people, who have clicked your link.