Will we need to create new accounts on the Stardock site and re-register the earlier versions of Sins and the expansions (in order to be able to re-install them from the Stardock site)? Would this mean that people will be able to safely uninstall Impulse?
When I pre-ordered Rebellion it brought me to the account page for the Stardock store after I was done. With the quick glance I took then, I noticed they had Demigod, Elemental, and GCII serials numbers on it. After seeing your post, I decided to check it again and found that Sins and both expansions were listed.
However, do note that they say to use Impulse to register and download them. So Stardock does have the registrations, so unless there is some kind of contract stopping them they could put all their games up for download.
Check your account here.