No extra registration at Idea.Informer required

I do not really understand why I need to sign up for a third service as idea.informer.com if I just want to give feedback to primarypad.com.
The authentification process could be handled under the hood between the to services, thus I would not need to bother about it (at least I should have the choice to log in with my primary pad account, if people already have an idea.informer.com account).
Also that commenting works but adding new suggestion does not without any explanation message as long as you do not have confirmed your Idea.Informer account made me quite annoyed about this feedback function.
Only my wish to help primary pad as etherpad server to improve and get better to gain more traction kept me going across the hurdles...