Signed up using the links provided in the instructions (not using the create account in the app) and straight away got 20Gb. The sign up page should mention SharewareOnSale and the 20Gb offer for those who are unsure.
Upload isn’t too bad given that the file is being encrypted at source too, but like everything, it could be better.
A couple of suggestions I would like though is a better web drive with image previews and proper integration for the Windows client with sync icons so it is easy to see if a file has been synced or not.