Dear whoever reads this,
Sorry to post here and this is probably not the best avenue, I just am not quite sure where this needs to go. The community forum (this one here) seems to have a specific sign-up bug, unless I'm just using it wrong in which case I deeply apologize. Whenever an NI account is used that is older and had at least one e-mail change, the community sign-up forum apparently possibly will:
1. Force you to associate the old e-mail even if you plain no longer own it. There is seemingly no way to change that during sign-up. Apparently, whoever owns it now would possibly at least get all your notifications for private messages etc, which seems like a privacy issue. If anything active can be done via this e-mail which isn't really confirmed or denied by the sign-up dialog, this would also seemingly be a security issue.
2. Force you to associate the old e-mail even if you do still own it, but contains a reference to an older private non-work e-mail, and then base the avatar initials image on that no matter what that may or may not leak about you. This is also seemingly a privacy issue.
The fix seems to be the sign-up dialog either needs to allow editing the e-mail, or it needs to fetch it properly instead of whatever outdated record it seems to sometimes use.
I made a throwaway NI account just to post this, because an e-mail to Native Instruments didn't go anywhere. It may have just been missed, gone to spam, or I'm not sure. I would like to use my actual NI account to sign-up here, but it seems like I'm likely blocked by this sign-up bug until it is fixed. If anyone knows who to contact so this will eventually get resolved, I'd be thankful! My apologies for bothering anyone with this.
Best regards