From what I've seen (Google paper, IIRC), it only makes sense economically if Musk's stretch goals for price/kg to orbit for Starship become true.

Technically it's fine, just take something like Starlink and use most of the power for compute rather than for comms.

But financially, it depends on price to orbit being extremely low; not just lower than Falcon, but as low as Musk's best public claims about what may be coming at some point.