Date on your profile that tells you when you need to renew your elite status.
I think it would be nice to know when your subscription time is coming to an end so you can be ready or have funds in your account to renew on time. Some times life gets in the way and I forget when I started the elite status. And I don't know if this has been posted before or not just decided to throw it up here anyways.
From the FAQ-
Q: When is my next subscription billing date?
A: This feature is not available currently, but will be coming soon./i]
Yep! It's coming soon. There were technical reasons when we launched that prevented us from including this feature. It's definitely a high priority fix, though.