Don't get me wrong, maybe space datacenters can be more efficient after decades of RND and maybe that RND is even worth it, but if you are the company who wants to convince me to give you money to reach that job you should not go like "cooling in space is free", because there is no such thing as free lunch in space engineering.
It is baffling me how much I'm defending this proposal because I don't actually think it's a sensible company but they really really do not do this.
The rest of the paper is a bit more sensible.