There was a pretty good indication that Manjaro was click-botting it a few years back, then Mint, and now MX. While I actually like Manjaro, that team is totally not above having done such a thing. And pretty much as soon as the rumors about that started, it mysteriously started dropping in the ranking...
Why? For a long time, DW was considered a source of distro recommendation and popularity. With these "attacks", it's become a community joke and not considered much of a real indication.