The article mentions one reason for small numbers predominating:

> The first is listicles. “3 ways to do X”, “5 things I wish I’d known”, “10 tools I actually use”. The listicle is practically the native unit of the link post, and its count is almost always small and round. Nobody writes “17 things I wish I’d known” unless they genuinely have 17 things, which is rare, whereas “5 things” is a decision made in a title editor.

But doesn't the title mangler specifically try to strip out numbers that look like they're part of listicle titles?