Want to see what gets sent? Try email activation. It's just a signature keyed to your current windows installation. It's sent to our servers to be processed into a sig.bin file for the game. We don't keep the data, and it's not anything that would be useful to us or anyone else anyway. It's not even hardware-keyed like some similar systems.
Ok, I appreciate your answer, so I took the time to look at it even against my will because no matter the source and the corp, such informations can never be trusted.
Every time Stardock Central is started it connects to google-analytics.com and transmits some informations for statistics collection. Including time, monitor resolution and quite a few encoded additional informations.
Now, in what way is that beneficial for the customer or needed for the provided functionality? This is only one example and I'm sure, that there is more if I only look hard enough. For example in all the cookies Stardock Central writes/reads. Oh and security is another issue. Do you know, that my account ID and password is transmitted in clear text? Over the internet? Anyone can read it and use it to gain access to my account if they only want to.
So you see, applications like Stardock Central are an issue. Maybe not more than other software but still enough.