That's true but we're in the middle of a pandemic and fighters are having to accept pay cuts (smaller purses) due to not having a live gate or optimistically at best only a small audience. That's why the entire purse is significantly smaller than it otherwise would be. Lomachenko would be making roughly 2½× more than Lopez here, or 2.7× more to be exact. That's expected though given that he's far more established, higher in profile, and has two of the three belts in this unification fight. He's the clear A-side in this.