If you spot Datacenters In Space as making sense, why does SpaceX acquiring XAi make sense to do it?

Why not have SpaceX build datacenter satellites and lease them to XAi et al, or XAi design and manufacture satellite datacenters and pay SpaceX to launch them? Heck, why not start a third company which focuses exclusively on datacenters in space, buying services from one company and selling them to another, so they can concentrate on this rather specialized skillset without distraction?

How does SpaceX acquiring XAi help anything but Elon Musk's personal portfolio?