I'd assume one of the reasons for them to lower the prize pool is because they added a point system through different pro scenes and it had a $60m prize pool. If this system didn't exist we'd maybe see Dota get a bigger prize pool, but the reduction in prize pool is for the better if it means they'll include the other titles as well.

https://liquipedia.net/esports/Esports_World_Cup/2024

There's another 1win tournament currently ongoing and we get to see some top-tier dotes between Gladiators and Team Spirit later in the grand final, while Entity and 1win fight for the third place. I would've taken the over maps for the finals, but unfortunately, the odds aren't available.