I would really love it if 1password offered an addon that essentially replicates what something like SimpleLogin does.
Being able to keep you email private by setting up aliases would be a killer feature that I would love to pay you for.
Why not use SimpleLogin? I am. But it is a single developer as far as I can tell and if he decides its more trouble than its worth, I would have to self host his open source project to prevent losing access to all my accounts.
I feel 1password has more staying power and it would be great to have this option (even if I pay an additional $2-5 per month) for my family plan.
Please... take my money and make it happen!