I asked the same question and &librosist answered me Aove here :

“liberosist (69) · 41 minutes ago
Steemit Inc operates the Steemit.com website, so their development team is responsible for the Trending page algorithm they run.

And how exactly change in algorithm fight the bots?
A frontend can decide to subtract amounts due to bots from the Trending page calculation, for example.”
Hope that helps 😍