[mst]

Title feels a little bit misleading - they're not collecting 'categorised search data' so much as 'categorising searches and then collecting an aggregate of only the categories.'

I'm not entirely sure how to phrase it better while keeping it pithy but the current wording reads to me like they're collecting the searches as well as the categories, and they deliberately aren't doing that.

(I entirely understand that some people will reasonably have an issue with what they -are- doing, but it's at least worth understanding what that actually is before deciding whether you're one of them :)