The end goal is to reduce the risk of blocks getting orphaned, which is the main reason bad actors like MARA shut down services like that. Spam-pools face the same risk if Knots adoption grows. The default 1-sat/vB filter in Core plays a role similar to what would happen if a restrictive datacarriersize filter were enforced by default. In both cases, miners like MARA would likely abandon spam-related services, since the chance of losing an entire block reward far outweighs a few thousand dollars in extra fees from spam transactions. I think it’s becoming obvious for which team Core devs is playing.