Sorry if this is in the wrong place, but I woke up with this idea on my mind and wanted to go ahead and suggest it!

I want to Suggest Custom Footnote Images/Emojis!
Where you design a Emoji and send it in to be Approved (Very similar process to custom Decor)
There would either be a fee required or an Item (Similar to Custom Decor Creation Stone)

If we were to go the fee route I think 2 gb per custom Emoji
If we were to go the Item route I think it should cost 10 gb and allow you to create/add 5 Custom Emojis/Footnote Images per Item used!

ALL Custom Emojis are tied to the Account so you can use them in Chatter, In the Chat Box, In the Footnotes of your Lions, and on your Profile where ever it's compatible!

There could be an Area (Similar to what we have with Custom Decor)
Where you can pay a fee to the creator of an Emoji/Footnote Image to be able to use it, Unlike Custom Decor there would be no limit on how many of the Emojis/Footnote Images that can be sold.

Feel Free to Offer Suggestions or to Voice your Opinions!