I mean, I'd prefer they used some form of renewable energy.

But there should be plenty of options once you start actually optimising for the same use-case as space data centres. Many places have very predictable wind (especially off-shore, which gives you bonus access to cooling water). Or maybe you could set up small hydro power schemes along remote rivers.

After the last round of this a few weeks/months ago I realized: Assuming the investors for this are too stupid to do the figures seen here themselves is folly. So, they must be factoring in something else-

Perhaps space based DCs allow for expansion into ITAR controlled countries and/or sanctioned countries/individuals.

Maybe throw in the fact that nobody can REALLY verify system behavior once its up there. So NSA/CIA etc sure are chomping at the bit to allow it.

I'm sure there's others I haven't thought of- probably less outlandish/tinfoily as well.