Don't know raider.io but here is the link to wowrank.io forum post about it which lead to them shutting down there site for a timeline (it was 2021 not 2022) and here's a link to blizzards API documents which list the change as is still a thing.
and ya a change would mean it's not the metric but for the most part people who compare API numbers like say Belluar don't even mention the change or that some of the sites even he used for numbers died due to it.