Judging by the number of posts we’ve seen in this community, the support team must get a lot of requests for custom categories.
We know why Monzo hasn’t provided them.
So I guess this was an attempt to make this functionality more visible, to point out that one of the use cases for custom categories was already covered - I want to keep track of how much I spend on X - & reduce the number of requests they receive. Even though unfortunately that’s not the most important / common? use case, in my opinion.
Edits - to add the text in green.