Free cooling?
Doesn't make much sense to me. As the article points out the radiators need to me massive.
Access to solar energy?
Solar is more efficient in space, I'll give them that, but does that really outweigh the whole hassle to put the panels in space in the first place?
Physical isolation and security?
Against manipulation maybe, but not against denial of service. Willfully damaged satellite is something I expect to see in the news in the foreseeable future.
Low latency comms?
Latency is limited by distance and speed of light. Everyone with a satellite internet connections knows that low latency is not a particular strength of it.
Marketing and PR?
That, probably.
EDIT:
Thought of another one:
Environmental impact?
No land use, no thermal stress for rivers on one hand but the huge overhead of a space launch on the other.