[rolelicense] Discussion: other features?

[calebj]

I did a small commission for someone, a cog that can generate "license keys" for roles that can be redeemed later. I'll be publishing it once I'm happy with it, but I'd like some comments on what I have so far.

The following features are complete:

• Add and disable redeemable roles
• Generate keys and DM to requesting admin
  • Custom key "templates"
  • As messages or a text file
  • Restricted to Administrator permission
• Track used keys, who redeemed them and when
• Transfer unused keys of one role to another

And the following are planned:

• Display/report/logs of key redemption
• Timed roles
  • Using additional keys will add more time
• List all redeemable roles and un/used key count
• A way to mark keys as "distributed", by who and when
  • Commands to pick from the list of "undistributed" keys
• A way to tag or group keys when generated
• Use sqlite instead of JSON
• CSV or plaintext import of keys from a file

What else should I add?